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b. Verb-Trans.: crystallisecrystallizeস্ফটিকীকৰণ কৰ্...
c. Verbal Adj.: crystallisedদানাদাৰ...
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b. Verb-Trans.: lubricateপিছল কৰ্रिमोनला खालाम...
Source: https://www.semanticscholar.org/paper/TOTAL-PETROLEUM-HYDROCARBONS-BY-GAS-CHROMATOGRAPHY-Cort%C3%A9s-Suspes/895bc0d4023203f4d4e93abebcc3c106de1f1a0b
Items in Chemistry
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a. Verbal Noun: crystallisationcrystallizationস্ফটিকীকৰণ...b. Verb-Trans.: crystallisecrystallizeস্ফটিকীকৰণ কৰ্...
c. Verbal Adj.: crystallisedদানাদাৰ...
2. Chemistry(Material Noun-Neuter) a precious yellow metallic element, highly malleable and ductile, and not subject to oxidation or corrosion. Symbol: Au; atomic weight: 196.967; atomic number: 79; specific gravity: 19.3 at 20°C. অতিশয় নমনীয় হালধীয়া বৰণৰ এক মূল্যবান ধাতৱ মৌল, যি বিজাৰিত বা ক্ষয়িত নহয়৷ পাৰমাণৱিক চিহ্নঃ Au; পাৰমাণৱিক ভৰঃ ১৯৬.৯৬৭; পাৰমাণৱিক সংখ্যাঃ ৭৯; আপেক্ষিক গুৰুত্বঃ ১৯.৩, ২০ ডিগ্ৰী চেলচেয়াচ উষ্ণতাত৷
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a. Proper Adj.: goldenকনকপ্ৰভকনকময়কাঞ্চনপ্ৰভকাঞ্চনমতী...
3. Chemistry(Material Noun-Neuter) a heavy malleable ductile magnetic silver-white metallic element that readily rusts in moist air, occurs native in meteorites and combined in most igneous rocks, is the most used of metals, and is vital to biological processes. গলাব পৰা, চুম্বকীয় এবিধ গধূৰ ধাতু, য`ত সেমেকা বায়ুৰ সংস্পৰ্শত মামৰে ধৰে। ই সবাতোকৈ অধিক ব্যৱহৃত ধাতু আৰু জৈৱিক প্ৰক্ৰিয়াৰ বাবেও অতি আৱশ্যকীয়।
4. Chemistry(Material Noun-Neuter) a liquid metal. With a freezing point of −38.83 °C and boiling point of 356.73 °C, mercury has one of the narrowest ranges of its liquid state of any metal. এবিধ জুলীয়া ধাতু
5. Chemistry(Material Noun-Neuter) Any of a category of electropositive elements that usually have a shiny surface, are generally good conductors of heat and electricity, and can be melted or fused, hammered into thin sheets, or drawn into wires. Typical metals form salts with nonmetals, basic oxides with oxygen, and alloys with one another. উজ্জ্বল পৃষ্ঠযুক্ত, তাপ আৰু বিদ্যুতৰ সুপৰিবাহী আৰু গলাব পৰা, পাতল পাত বা তাঁৰলৈ ৰূপান্তৰিত কৰিব পৰা, ধনাত্মক আধানযুক্ত মৌল ৷ আদৰ্শ ধাতুৱে অধাতুৰ সৈতে বিক্ৰিয়া কৰি লৱণ, অক্সিজেনৰ সৈতে খাৰুৱা অক্সাইড আৰু অন্য ধাতুৰ সৈতে সংকৰ ধাতু উত্পন্ন কৰে ৷
6. Chemistry(Material Noun-Neuter) A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins, jewellery, tableware and photography. সৰ্ব্বোচ্চ বৈদ্যুতিক আৰু তাপৰ পৰিবাহিতা যুক্ত এক কোমল, বগা, মূল্যবান, একযোজী ধাতৱ মৌল; আৰ্জেন্টাইট হিচাপে আৰু মুক্ত ৰূপত পোৱা যায়; মুদ্ৰা, অলঙ্কাৰ আৰু পাত্ৰ তৈয়াৰ কৰাত আৰু আলোক চিত্ৰ গ্ৰহণ প্ৰক্ৰিয়াত ব্যৱহাৰ কৰা হয়৷
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a. Proper Adj.-Neuter: silveryৰূপালীৰূপোৱালীrup athengrupa gab...
7. BiologyChemistry(Verbal Noun) [Bacteriology, Immunology] the specific cellular response to foreign matter, as in testing for allergies.
[Chemistry] the reciprocal action of chemical agents upon each other; chemical change. (বেক্টেৰিয়া-বিজ্ঞান, ৰোগ-প্ৰতিৰোধ বিজ্ঞান) বহিঃপদাৰ্থৰ প্ৰৱেশ ঘটিলে শৰীৰৰ প্ৰতিৰোধী কোষসমূহে দিয়া সমিধান, যেনেঃ এলাৰ্জীৰ পৰীক্ষা
(ৰসায়ন বিজ্ঞান) ৰাসায়নিক পদাৰ্থসমূহৰ মাজত পাৰস্পৰিক ক্ৰিয়া; ৰাসায়নিক পৰিৱৰ্ত্তন
8. Chemistry(Material Noun-Neuter) a chemical element in gaseous form in room temperature. 80% of Earth's atmosphere is composed of this gas and the key to survival of life forms স্বাভাৱিক উষ্ণতাত গেছীয় অৱস্থাত থকা এক ৰাসায়নিক পদাৰ্থ ৷ পৃথিৱীৰ বায়ুমণ্ডলৰ ৮০ শতাংশ এই গেছেৰে গঠিত আৰু ই সকলো জীৱ জীয়াই থকাৰ বাবে অপৰিহাৰ্য্য ৷
9. Chemistry(Material Noun-Neuter) a chemical compound that can donate a hydrogen ion (H+) to a base or alkali. এক ৰাসায়নিক যৌগ, যি কোনো ক্ষাৰজাতীয় যৌগক এটা হাইড্ৰ’জেন আয়ন দান কৰিব পাৰে ৷
10. Chemistry(Material Noun-Neuter) a product of two or more elements combined chemically দুই বা ততোধিক মৌল ৰাসায়নিক ভাৱে সংযোজিত হৈ উত্পন্ন হোৱা পদাৰ্থ
11. Chemistry(Material Noun-Neuter) water in gaseous state as distinguished from liquid or solid state. পানীৰ গেছীয় অৱস্থা
12. Chemistry(Material Noun-Neuter) any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity এলুমিনিয়াম বা পটাছিয়াম আদিৰ আৰ্দ্ৰ চিলিকেটৰ দ্বাৰা গঠিত খনিজ পদাৰ্থ, যি স্ফটিকলৈ ৰূপান্তৰিত হৈ অতি পাতল পাতৰ সৃষ্টি কৰে; ইয়াৰ প্ৰচূৰ বিদ্যুত্ ৰোধক ক্ষমতা আছে বাবে বৈদ্যুতিক সঁজুলিত ব্যৱহাৰ হয় ৷
13. Chemistry(Material Noun-Neuter) a soft white powder produced by adding water to quicklime এক ধৰণৰ চূণশিলত পানী মিহলাই প্ৰস্তুত কৰা কোমল বগা চূৰ্ণ বা পাওদাৰ
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a. Common Noun-Neuter: caco3limestoneচূণশিলसुनै अनथायu mawshun...
14. Chemistry(Material Noun-Neuter) Substance that imparts a color. যিকোনো বস্তুক বৰণ দিব পৰা পদাৰ্থ
16. ChemistryCuisine-Food(Material Noun-Neuter) a substance that renders the taste of sweetness সোৱাদত মিঠা এবিধ খোৱা-বস্তু, যাক অন্য খাদ্য বা পানীয় আদি মিঠা কৰিবলৈ ব্যৱহাৰ কৰা হয়।
17. ChemistryPhysics(Material Noun-Neuter) A fundamental, or irreducible constituent of a chemical compound কোনো এক ৰাসায়নিক যৌগৰ বুনিয়াদী বা মূল উপাদান, যাক আৰু অধিক সৰু কৰিব নোৱাৰি।
18. Chemistry(Abstract Noun) The flash point is the lowest temperature at which a liquid or solid gives off enough vapour to form a flammable air-vapour mixture near its surface. The lower the flash point, the greater the fire hazard. যি নিম্নতম উষ্ণতাত কোনো পদাৰ্থৰ পৰা জুই জ্বলিব পৰা ভাষ্প ওলায়৷
19. Chemistry(Material Noun-Neuter) any of various metal alloys consisting mainly of copper and zinc তাম আৰু দস্তাৰ মিশ্রণত তৈয়াৰী এবিধ হালধীয়া বৰণৰ ধাতু ।
20. Chemistry(Material Noun-Neuter) a malleable, ductile, metallic element having a characteristic reddish-brown color: used in large quantities as an electrical conductor and in the manufacture of alloys, as brass and bronze. Symbol: Cu; atomic weight: 63.54; atomic number: 29; specific gravity: 8.92 at 20°C NULL
21. Chemistry(Material Noun-Neuter) any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying according to composition and heat treatment: generally categorized as having a high, medium, or low-carbon content কম কাৰ্ব্বন-যুক্ত ৰূপান্তৰিত লো, যাৰ কঠিনতা, নমনীয়তা আৰু শক্তি নিহিত থকা কাৰ্ব্বনৰ পৰিমাণৰ ওপৰত নিৰ্ভৰ কৰি বেলেগ বেলেগ হয় ৷
22. Chemistry(Material Noun-Neuter) a low-melting, malleable, ductile metallic element nearly approaching silver in color and luster: used in plating and in making alloys, tinfoil, and soft solders. Symbol:. Sn; atomic weight:. 118.69; atomic number:. 50; specific gravity:. 7.31 at 20°C. NULL
23. Chemistry(Material Noun-Neuter) any of various bases, the hydroxides of the alkali metals and of ammonium, that neutralize acids to form salts and turn red litmus paper blue খাৰুৱা ধাতু আৰু এম’নিয়ামৰ হাইদ্ৰক্সাইড, যি এছিড বা অম্লক প্ৰশমিত কৰি লৱণ সৃষ্টি কৰে আৰু ৰঙা লিটমাছ কাগজক নীলা কৰে
24. Chemistry(Material Noun-Neuter) a highly elastic solid substance, light cream or dark amber in color, polymerized by the drying and coagulation of the latex or milky juice of rubber trees and plants, esp. Hevea and Ficus species. মাখন ৰং বা মাটি ৰঙৰ সহজে টানি দীঘল কৰিব পৰা এবিধ পদাৰ্থ৷
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25. Chemistry(Material Noun-Neuter) a substance that causes or accelerates a chemical reaction without itself being affected. আত্মক্ষয় নকৰাকৈ কোনো ৰাসায়নিক বিক্ৰিয়াক দ্ৰুততৰ কৰি তোলা পদাৰ্থ বিশেষ
27. Chemistry(Verbal Noun) to evaporate a liquid and later condense it back to its liquid form usually to purify the liquid কোনো তৰলক পৰিশোধন কৰাৰ বাবে বাষ্পীভূত কৰি পুনৰাই তাক তৰলীকৰন কৰা কাৰ্য্য
28. Chemistry(Material Noun-Neuter) a positively-charged particle consisting of a proton and two neutrons, equivalent to the nucleus of an atom of tritium. ট্ৰাইটিয়ামৰ এটা অনুৰ সমতুল্য এটা প্ৰ’ট’ন আৰু দুটা নিউট্ৰন থকা এক ঋণাত্মক আধানযুক্ত কণা
29. Chemistry(Material Noun-Neuter) a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum এলুমিনিয়ামৰ এমোনিয়াম দ্বি-চালফেট; এক বগা স্ফটিক
30. Chemistry(Material Noun-Neuter) any of a group of substances composed of hydrocarbons, alcohols, fatty acids, and esters that are solid at ordinary temperatures
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33. ChemistryGeology(Common Noun-Neuter) An abundant rock of marine and fresh-water sediments primarily composed of calcite
34. Chemistry(Material Noun-Neuter) a colourless, tasteless odourless gaseous element that forms largest part of the atmosphere
35. Chemistry(Verbal Noun) the effect in which a chemical substance helps a chemical reaction without changing itself এক ৰাসায়নিক প্ৰক্ৰিয়া য`ত এটা ৰাসায়নিক পদাৰ্থই প্ৰক্ৰিয়াটোক সহায় কৰে কিন্তু নিজে সলনি নহয়
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39. Chemistry(Abstract Noun-Neuter) Process to separate or obtain ingredient, etc. from a mixture by pressure, distillation, treatment with solvents, or the like.
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40. Chemistry(Material Noun-Neuter) a long molecule made up of chain of identical structural units or monomers একযোগী বা আন কোনো সংৰচনাৰ সদৃশ শৃংখলাৰ দ্বাৰা গঠিত এটা জটিল অনু
41. Chemistry(Material Noun-Neuter) any two or more compounds with the same molecular formula but with different structure পৰস্পৰ সদৃশ আনবিক সূত্ৰ বিশিষ্ট কিন্তু ভিন্ন গাঁঠনি বিশিষ্ট দুটা বা ততোধিক মিশ্ৰ
42. Chemistry(Abstract Noun-Neuter) The process of combining with oxygen, e.g., the process by which rust is formed on iron surface অক্সিজেন বা অম্লজানৰ সৈতে হোৱা বিক্ৰিয়া, যেনেঃ লোৰ পৃষ্ঠত মামৰে ধৰা প্ৰক্ৰিয়া
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43. Chemistry(Material Noun-Neuter) H2CO3, normally formed when carbon dioxide dissolves in water কাৰ্বন-ডাই-অক্সাইদ পানীত মিহলি হ’লে উৎপাদন হোৱা এবিধ অম্ল
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44. Chemistry(Material Noun-Neuter) White crystalline salty substance, scientifically named Potassium Nitrate, used in preserving meat and also in making gunpowder. মাংস সংৰক্ষণ কৰিবলৈ আৰু বিস্ফোৰক প্ৰস্তুত কৰিবলৈ ব্যৱহাৰ কৰা এবিধ দানাযুক্ত লৱণ, যাৰ বৈজ্ঞানিক নাম পটাচিয়াম নাইট্ৰেট।
45. Chemistry(Material Noun-Neuter) A white crystalline chemical substance. Melting point 2580 degrees C. এবিধ বগা কঠিন পদাৰ্থ৷ গলানাংক ২৫৮০ ডিগ্ৰী ছেল৷
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47. Chemistry(Material Noun-Neuter) A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten. দুই বা ততোধিক ধাতু অথবা ধাতু আৰু অধাতুৰ মিশ্ৰণ |
49. Chemistry(Material Noun-Neuter) a polymer formed by combination of two or more monomers দুই বা ততোধিক বহুযোগী সংযুক্ত হৈ গঠিত হোৱা যৌগ
50. ChemistryPhysics(Abstract Noun) an imaginary gas that exhibit volume (V) inversely proposonal to pressure (P) at a given temperature and given mass. i.e., V ∞ 1/P
Some gases in certain pressure conditions, exhibit behavior very close to Ideal Gas স্থিৰ উষ্ণতাত যি কাম্পনিক গেছৰ কোনো নিৰ্দিষ্ট ভৰৰ আয়তন গেছৰ চাপৰ ব্যস্তানুপাতিক, অৰ্থৎ V ∞ 1/P
51. Chemistry(Material Noun-Neuter) a sweet chemical substance used instead of sugar. কৃত্ৰিম ভাৱে তৈয়াৰী শৰ্কৰা নথকা কিন্তু চেনিৰ দৰে মিঠা দ্ৰৱ্য। ইয়াক কয়লাৰ পৰা বনোৱা হয় ।
52. Chemistry(Material Noun-Neuter) any air like substance i.e. neither liquid nor solid. বতাহৰ দৰে আকাৰ নথকা আৰু খোলা পাত্ৰত আবদ্ধ কৰি ৰাখিব নোৱাৰা পদাৰ্থ৷
53. Chemistry(Material Noun-Neuter) A chemical compound (O3) composed of three oxygen atoms. The ozone layer is found in the stratosphere around 15-30 km above the earth`s surface. মূলতঃ অক্সিজেনৰ লগত একে এবিধ গেছ৷
54. Chemistry(Material Noun-Neuter) A chemical element with atomic number of 6, the building block of the biosphere of the Earth.
55. Chemistry(Material Noun-Neuter) The molecules that can prevent the oxidation of other molecules. যি অণুৱে আন কিছুমান অণুৰ জাৰণ হোৱাৰ ৰোধ কৰিব পাৰে৷
56. Chemistry(Material Noun-Neuter) a chemical element with properties intermediate between those of typical metals and nonmetals আদৰ্শ ধাতু আৰু অধাতুৰ মধ্যৱৰ্তী গুণ বিশিষ্ট ৰাসায়নিক মৌলবিলাক
57. Chemistry(Abstract Noun) The symbolic representation of the atoms that comprise of a chemical molecule. যৌগ এটাত থকা উপাদান মৌলৰ পৰমাণুসমূহৰ চিহ্নৰদ্বাৰা প্ৰকাশ কৰা যৌগৰ ক্ষুদ্ৰতম অংশ বা অণু এটাৰ প্ৰতিচ্ছবি৷
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58. Chemistry(Proper Noun-Common) A chemical compound of iron and sulfur. It is crystalline and green in color. Chemical Formula: FeSO4 লো আৰু গন্ধকৰ স্ফটিকাকাৰ সেউজীয়া যৌগিক পদাৰ্থ,
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59. Chemistry(Common Noun-Neuter) an element not having the character of a metal, as carbon or nitrogen ধাতুৰ গুণ বা ধৰ্ম বহন নকৰা মৌলিক পদাৰ্থ, যেনেঃ কাৰ্বন, নাইট্ৰোজেন
60. Chemistry(Common Noun-Neuter) one of two or more existing forms of an element e.g. graphite and diamond are allotropes of carbon কিছুমান মৌলৰ ক্ষেত্ৰত উপলব্ধ দুই বা ততোধিক ৰূপ, যেনেঃ গ্ৰেফাইট আৰু হীৰা কাৰ্বনৰ অৱৰূপ
61. Chemistry(Abstract Noun) a property of certain elements, as carbon, sulfur, and phosphorus, of existing in two or more distinct forms কাৰ্বন, ছালফাৰ, ফচফৰাচ আদি কিছুমান মৌল একোটা দুই বা ততোধিক ৰূপত উপলব্ধ হোৱা পাৰিঘটনা
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62. Chemistry(Material Noun-Neuter) a substance, as oil or grease, for lessening friction, especially in the working parts of a mechine. কোনো যন্ত্ৰৰ কাৰ্য্যকৰী অংগবোৰৰ মাজত ঘৰ্ষণ হ্ৰাস কৰাৰ বাবে প্ৰয়োগ কৰা তৈলজাতীয় পদাৰ্থ।
Description
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Different POS:
a. Verbal Noun: lubricationতেল দিয়াস্নেহন...b. Verb-Trans.: lubricateপিছল কৰ্रिमोनला खालाम...
Super Idea:
c. Verbal Noun: lubricationতেল দিয়াস্নেহন...
64. Chemistry(Verbal Noun) the act or process of forming a polymer or copolymer, esp a chemical reaction in which a polymer is formed. একাধিক একযোগী লগ লাগি বহুযোগী উৎপন্ন কৰা ৰাসায়নিক প্ৰক্ৰিয়া বা কাৰ্য্য।
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65. Chemistry(Proper Adj.-Neuter) capable of decaying through the action of living organisms. জীৱৰ দ্বাৰা সংঘটিত বিক্ৰিয়াৰ জৰিয়তে গেলি-পচি যাব পৰা।
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66. Chemistry(Proper Adj.-Neuter) incapable of decaying through the action of living organisms জীৱৰ দ্বাৰা সংঘটিত বিক্ৰিয়াৰ জৰিয়তে গেলি-পচি যাব নোৱাৰা
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67. Chemistry(Material Noun-Neuter) a group of naturally occurring chemical compounds which mostly contain basic nitrogen atoms. This group also includes some related compounds with neutral and even weakly acidic properties. Also some synthetic compounds of similar structure are attributed to alkaloids. In addition to carbon, hydrogen and nitrogen, alkaloids may also contain oxygen, sulfur and more rarely other elements such as chlorine, bromine and phosphorus. মূলতঃ নাইট্ৰোজেন যুক্ত খাৰকীয় গুণযুক্ত ৰাসায়ণিক যৌগ।
68. Chemistry(Material Noun-Neuter) alkaloid present in tobacco, the main factor responsible for the dependence-forming properties of tobacco smoking / chewing. ধপাতত থকা উপক্ষাৰ, ধপাত সেৱনৰ আসক্তিৰ মূল কাৰক।
69. Chemistry(Abstract Noun) a thermochemical decomposition of organic material at elevated temperatures in presence of high pressure and suitable catalyst with no oxygen. উষ্ণতা, চাপ আৰু অনুঘটকৰ প্ৰভাৱত উচ্চ আনৱিক ভৰবিশিষ্ট হাইড্ৰকাৰ্বনৰ বিযোজন ঘটাই নিম্ন আনৱিক ভৰবিশিষ্ট হাইড্ৰকাৰ্বন প্ৰস্তুত কৰা প্ৰক্ৰিয়া৷
70. Chemistry(Abstract Noun) a subatomic nuclear particle with a positive electric charge. পদাৰ্থৰ নিউক্লিয়াছত থকা এবিধ ধনাত্মক আধানযুক্ত কণা ৷
71. Chemistry(Abstract Noun) the conversion of one chemical element or isotope into another through nuclear reaction এটা মৌলক আন এটা মৌললৈ পৰিৱৰ্তন কৰা ৷
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72. Chemistry(Abstract Noun) atom of the same element which have same atomic number but different mass number. মৌল এটাৰ বিভিন্ন ভৰ একে পাৰমাণবিক বিশিষ্ট পৰমাণু৷
73. Chemistry(Abstract Noun) A colloidal system involving one liquid dispersed in another. এটা তৰলৰ ক্ষুদ্ৰ ক্ষুদ্ৰ গোলক আন এটা তৰলৰত বিস্তাৰিত কৰিলে যি কলয়ডীয় বিস্তাৰণ পোৱা যায় ৷
74. Chemistry(Abstract Noun) Substance containing free ions that make the substance electrically conductive. মুক্ত আয়ন থকা পদাৰ্থসমষ্টি বা দ্ৰৱ, মুক্ত আয়নে এনে পদাৰ্থসমষ্টিক বিদ্যুত প্ৰবাহী কৰি তোলে, এনে দ্ৰৱৰ মাজেৰে বিদ্যুত প্ৰবাহিত হ’লে, দ্ৰৱৰ ভৌতিক তথা ৰাসায়নিক পৰিৱৰ্তন ঘতে ৷
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75. Chemistry(Abstract Noun) The neutron is a subatomic nuclear particle with no net electric charge. পদাৰ্থৰ নিউক্লিয়াছত থকা এবিধ আধানবিহীন কণা ৷
76. Chemistry(Abstract Noun) volume related calculation of matter in a reaction. বিক্ৰিয়া এটা সম্পন্ন হোৱাৰ আগত আৰু পাছত গেছীয় পদাৰ্থৰ আয়তনৰ পৰিৱৰ্তন বিষয়ক অধ্যয়ন ৷
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77. Chemistry(Abstract Noun) Branch of science deals with changes in energy (usually heat energy) that accompany physical or chemical changes in matter. ৰাসায়নিক বিক্ৰিয়াত ঘটা শক্তি (ঘাইকৈ তাপ শক্তি) ৰ পৰিৱৰ্তন সম্পৰ্কীয় বিজ্ঞান ৷
78. Chemistry(Abstract Noun) A phenomenon of high concentration of molecular species (gases or liquids) on the surface of the solid as compared to that in the bulk. কঠিন পদাৰ্থৰ পৃষ্ঠদেশত থকা অৱ্শিষ্ট বলে ইয়াৰ সংস্পৰ্শলৈ অহা তৰল আৰু গেছীয় পদাৰ্থৰ অণুক নিজৰ ফালে আকৰ্ষণ কৰা ধৰ্ম৷
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79. Chemistry(Abstract Noun) atoms of different elements having the same mass number but differ in their atomic number. যিবোৰ পৰমাণুৰ ভৰ ক্ৰমাংক একে কিন্তু পৰমাণু ক্ৰমাংক বেলেগ ৷
80. Chemistry(Abstract Noun) atoms of different elements having same number of neutrons ভিন্ন ভৰ ক্ৰমাংক বিশিষ্ট কিন্তু সমান সংখ্যক নিউট্ৰ্ন থকা পৰমাণুসমূহ ৷
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81. Chemistry(Abstract Noun) atoms of different elements having same number of neutrons ভিন্ন ভৰ ক্ৰমাংক বিশিষ্ট কিন্তু সমান সংখ্যক নিউট্ৰ্ন থকা পৰমাণুসমূহ ৷
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82. Chemistry(Material Noun-Neuter) An agent that adds electrons to an atom or ion (as by removing oxygen or adding hydrogen)
যি দ্ৰব্যই কোনো মৌল বা মূলকৰ সৈতে ইলেক্ট্ৰণ যোগ কৰি দিয়ে৷
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Different POS:
a. Proper Noun-Neuter: reductionবিজাৰণ...Related Idea:
b. Material Noun-Neuter: antioxidantপ্ৰতিজাৰক...
84. Chemistry(Material Noun-Neuter) a white crystalline soluble poisonous acidic derivative of benzene, used as an antiseptic and disinfectant. বেঞ্জিনৰ পৰা উৎপাদিত পানীত দ্ৰৱণীয় এক অম্ল, যাক বীজাণুনাশক ৰূপে ব্যৱহাৰ কৰা হয়৷
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85. Chemistry(Common Noun-Neuter) a liquid used for dissolving a solid substance so that it becomes part of the liquid গোটা পদাৰ্থ দ্ৰৱীভূত কৰিবলৈ ব্যৱহাৰ কৰা জলীয় পদাৰ্থ
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87. ChemistryPhysics(Abstract Noun) the emission of radiation, especially of visible light, by a substance when exposed to an external radiation of different frequencies, may be visible or x-rays. ৰঞ্জন ৰশ্মি বা আন দৃশ্যমান ৰশ্মিৰ প্ৰভাৱত কোনো বস্তুৱে নিৰ্গত কৰা দৃশ্যমান পোহৰৰ ৰশ্মি বা আভা
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88. Chemistry(Material Noun-Neuter) A chemical element with atomic number of 11. এটা ৰাসায়নিক মৌল, যাৰ পাৰমাণৱিক সংখ্যা ১১ ৷
89. Chemistry(Material Noun-Neuter) The chloride ion is formed when the element chlorine, a halogen, gains an electron to form an anion (negatively-charged ion) Cl? ক্ল’ৰিণে এটা ইলেক্ট্ৰ’ন গ্ৰহণ কৰি ঋণাত্মক আধান-যুক্ত হ’লে ক্ল’ৰাইডৰ ৰূপ লয়৷
90. Chemistry(Material Noun-Neuter) a process of generating a silver coating ৰূপৰ প্ৰলেপ দিয়া এক প্ৰক্ৰিয়া
91. Chemistry(Material Noun-Neuter) A chemical compound containing Oxygen. অক্সিজেন বা অম্লজান থকা কোনো ৰসায়নিক যৌগ৷
92. Chemistry(Abstract Noun) the branch of chemistry concerned with the compounds of carbon কাৰ্বনৰ যৌগ সমূহৰ বিষয়ে অধ্যয়ন কৰা ৰসায়নৰ এক বিভাগ
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93. Chemistry(Abstract Noun) the branch of chemistry concerned with the elements and all their compounds except those containing carbon কাৰ্বনৰ বাহিৰে আন মৌলযুক্ত যৌগ সমূহৰ বিষয়ে অধ্যয়ন কৰা ৰসায়নৰ এক বিভাগ
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94. Chemistry(Material Noun-Neuter) a chemical agent that oxidizes, i.e. coverts (an element) to oxide by adding oxygen যি ৰাসায়নিক পদাৰ্থই (কোনো মৌলৰ সৈতে) অক্সিজেন যোগ কৰি অক্সাইদলৈ ৰূপান্তৰিত কৰে
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95. Chemistry(Material Noun-Neuter) Bronze is an alloy consisting primarily of copper. The addition of other metals (usually tin, sometimes arsenic), produces an alloy much harder than plain copper. The historical period where the archeological record contains many bronze artifacts is known as the Bronze Age. তাম আৰু টিনৰ সংকৰ ধাতু৷ কেতিয়াবা তামৰ লগত আৰ্চেনিকো মিহলাই
96. Chemistry(Material Noun-Neuter) plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of highmolecular mass, but they often contain other substances. They are usually synthetic, most commonly derived from petrochemicals, but many are partially natural সংশ্লেষিত অথবা অৰ্ধ সংশ্লেষিত জৈৱিক গোটা পদাৰ্থ৷ প্ৰায়ে প্ৰেটোলিয়াম সামগ্ৰীৰ পৰা তৈয়াৰ কৰা হয়৷
97. Chemistry(Material Noun-Neuter) Ethers are a class of organic compounds that contain an ether group — an oxygen atom connected to two alkyl or aryl groups — of general formula R–O–R জৈৱিক যৌগ৷
98. Chemistry(Abstract Noun) An influential philosophical tradition whose practitioners have, from antiquity, claimed it to be the precursor to profound powers. The defining objectives of alchemy are varied but historically have typically included one or more of the following goals: the creation of the fabled philosopher`s stone; the ability to transmute base metals into the noble metals (gold or silver); and development of an elixir of life, which would confer youth and longevity. পৌৰাণিক ৰসায়নবিদ যি সকলে সকলো ধাতুক সোণলৈ ৰূপান্তৰ কৰিবলৈ বিছাৰিছিল আৰু জীৱন ৰস তৈয়াৰ কৰি অমৰত্ব পাবলৈ বিছাৰিছিল৷
99. Chemistry(Common Noun-Common) person who studeid or did research in alchemy. যিসকল ব্যক্তিয়ে অপৰসায়ন চৰ্চা কৰিছিল৷
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100. Chemistry(Material Noun-Neuter) An antacid is a substance which neutralizes stomach acidity
যি ৰাসায়নিক পদাৰ্থই পেটৰ অম্লতা নাশ কৰে৷
101. Chemistry(Abstract Noun) a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
প্ৰায় সৰন্ধ্ৰ পৰ্দা এখনৰ মাজেৰে পদাৰ্থৰ বাচনিক সঞ্চাৰণ হোৱা প্ৰক্ৰিয়াকে ৰসাক্ৰষণ বোলা হয়৷
102. Chemistry(Abstract Noun) Pressure that is responsible for osmosis process. যি চাপে ৰসাকৰ্ষণ প্ৰক্ৰিয়া ঘটায়৷ প্ৰায় সৰন্ধ্ৰ পৰ্দা এখনৰ মাজেৰে পদাৰ্থৰ বাচনিক সঞ্চাৰণ হোৱা প্ৰক্ৰিয়াকে ৰসাকৰ্ষণ বোলা হয়৷
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103. Chemistry(Material Noun-Neuter) Lawrencium is a synthetic chemical element with chemical symbol Lr and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. মৌল৷ পাৰমাণবিক সংখ্যা ১০৩৷ ইউৰেনিয়াম উত্তৰ মৌল৷ ই তেজস্কিয় মৌল৷
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104. Chemistry(Material Noun-Neuter) A synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ১০১৷ ইউৰেনিয়াম উত্তৰ মৌল৷
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105. Chemistry(Material Noun-Neuter) A synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series. ই তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ১০০৷ ইউৰেনিয়াম উত্তৰ মৌল৷
106. Chemistry(Material Noun-Neuter) A synthetic element with symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৯৷ ইউৰেনিয়াম উত্তৰ মৌল৷
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107. Chemistry(Material Noun-Neuter) A radioactive metallic chemical element with symbol Cf and atomic number 98. The element was first made in 1950 at the University of California Radiation Laboratory in Berkeley, by bombarding curium with alpha particles. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৮৷ ইউৰেনিয়াম উত্তৰ মৌল৷
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108. Chemistry(Material Noun-Neuter) A chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element.
এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৩৷ প্ৰথমটো ইউৰেনিয়াম উত্তৰ মৌল৷
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109. Chemistry(Material Noun-Neuter) Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৪৷ ইউৰেনিয়াম উত্তৰ মৌল৷
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110. Chemistry(Material Noun-Neuter) Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ১০২৷ ইউৰেনিয়াম উত্তৰ মৌল৷
111. Chemistry(Material Noun-Neuter) A radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৫৷ ইউৰেনিয়াম উত্তৰ মৌল৷
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112. Chemistry(Material Noun-Neuter) Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. এক তেজস্কিয় মৌল৷ পাৰমাণবিক সংখ্যা ৯৬৷ ইউৰেনিয়াম উত্তৰ মৌল৷
113. Chemistry(Proper Noun-Neuter) A transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide and transuranium element series. মৌল৷ পাৰমাণবিক সংখ্যা ৯৭৷ ইউৰেনিয়াম উত্তৰ মৌল৷ ই তেজস্কিয় মৌল৷
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114. Chemistry(Abstract Noun) Calcinations is the process of subjecting a substance to the action of heat, but without fusion, for the purpose of causing some change in its physical or chemical constitution.
কোনো পদাৰ্থত গলণ নোহোৱাকৈ তাপ দিয়া প্ৰক্ৰিয়া, এনে কৰা হয় কোনো ভৌতিক বা ৰাসায়ণিক পৰিবৰ্তন আনিবলৈ৷
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115. Chemistry(Material Noun-Neuter) Raddish-white metallic element এবিধ বগা বৰণৰ ধাতু৷ পৰ্যাবৃত্ত তালিকাত ইয়াৰ ক্ৰমাংক তিৰাশী৷
116. Chemistry(Material Noun-Neuter) Inflammable waxy or oily substance got by distillation from petroleum কাৰ্বন আৰু হাইড্ৰজেন সংযুক্ত হৈ সৃষ্টি হোৱা একশ্ৰেণী হাইড্ৰকাৰ্বন৷ ইয়াক এলকেম বুলিও কোৱা হয়
117. Chemistry(Material Noun-Neuter) Non-metallic element. এবিধ অধাতু৷ পৰ্যাবৃত্ত তালিকাত ইয়াৰ স্থান ১৫ ৷
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118. Chemistry(Material Noun-Neuter) Salt of phosphoric acid. ফছফৰিক এচিডবোৰৰ পৰা ক্ষাৰকৰ ক্ৰিয়াৰ ফলত উৎপন্ন হোৱা এবিধ লোণজাতীয় পদাৰ্থ ৷
119. Chemistry(Material Noun-Neuter) Compound of fluorine with metal এবিধ হাইড্ৰ্ফ্লৰিক এচিডৰ লৱণ৷ ই এক খনিজ পদাৰ্থ৷
120. Chemistry(Material Noun-Neuter) Colourless sweet viscous liquid used in medicines, explosives,etc এবিধ বৰ্ণহীন, সোৱাদ লগা জুলীয়া পদাৰ্থ৷ ই পানী আৰু এলকহলত দ্ৰৱণীয়
121. Chemistry(Material Noun-Neuter) Dense highly corrosive oily acid এবিধ শক্তিশালী অম্ল৷ চালফাৰ-ট্ৰাই-অক্সাইড আৰু পানীৰ ক্ৰিয়াৰ ফলত ই উৎপন্ন হয়
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122. Chemistry(Material Noun-Neuter) a chemical element with symbol Ti and atomic number 22 এবিধ ধাতু৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ স্থান ২২
123. Chemistry(Material Noun-Neuter) a chemical element with symbol W and atomic number 74 এবিধ ধাতব পদাৰ্থ৷ ইয়াক উলফ্ৰেম বুলিও কোৱা হয়৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ ক্ৰমিক সংখ্যা ৭৪
124. Chemistry(Material Noun-Neuter) a chemical element with symbol Xe and atomic number 54 এবিধ বিৰল গেচ তথা অধাতব পদাৰ্থ৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ ক্ৰমিক সংখ্যা ৫৪
125. Chemistry(Material Noun-Neuter) non-metallic element in some sulphide ores এবিধ ধাতু৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ সংখ্যা ৩৪
126. Chemistry(Material Noun-Neuter) non-metallic element occuring in silica and silicates এবিধ অধাতু৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ সংখ্যা ১৪
127. Chemistry(Material Noun-Neuter) a chemical element with symbol Zr and atomic number 40 এবিধ ধাতব পদাৰ্থ৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ সংখ্যা ৪০
128. Chemistry(Material Noun-Neuter) a chemical element with symbol Ge and atomic number 32 এবিধ ধাতব ৰাসায়নিক মৌল৷ পৰ্য্যাবৃত্ত তালিকাত ইয়াৰ সংখ্যা ৩২
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132. Chemistry(Common Noun-Common &/or Masculine) Each elementary particle is a particle with the same mass but opposite charge, such as the antiparticle of an electron, a positron. প্ৰতিটো মৌলিক কণিকাৰ সমান ভৰ কিন্তু বিপৰীত আধান থকা কণিকা; যেনে, ইলেক্ট্ৰ'নৰ প্ৰতিকণিকা পজিট্ৰ'ন।
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133. Chemistry(Material Noun-Neuter) Pathogens produced within bacteria বেক্টেৰিয়াৰ ভিতৰত উৎপন্ন হোৱা ৰোগ সৃষ্টিকাৰী পদাৰ্থ
135. Chemistry(Material Noun-Neuter) a salt of nitric acid or a compound made of nitric acid and alcohol
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137. Chemistry(Abstract Noun) A combustible substance that evaporates when left open মুকলিকৈ থ'লে ভাপ হৈ উৰি যোৱা এবিধ দাহ্য পদাৰ্থ
138. Chemistry(Material Noun-Neuter) any compound of boron and hydrogen, used in the synthesis of other boron compounds and as high-energy fuels. ব`ৰন আৰু হাইড্ৰ`জেনৰ যিকোনো যৌগ, অন্য ব`ৰন যৌগ সংশ্লেষণত আৰু উচ্চ শক্তিৰ ইন্ধন হিচাপে ব্যৱহাৰ কৰা৷
139. Chemistry(Material Noun-Neuter) any of various powders used as a substitute for yeast in baking, composed of sodium bicarbonate mixed with an acid substance. বেকিঙত ঈষ্টৰ বিকল্প হিচাপে ব্যৱহাৰ কৰা বিভিন্ন গুড়িৰ যিকোনো এটা, যিটো এচিড পদাৰ্থৰ সৈতে মিহলি কৰা ছডিয়াম বাইকাৰ্বনেটৰ দ্বাৰা গঠিত৷
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140. Chemistry(Abstract Noun) the property of a body that determines the fraction of incident radiation absorbed or absorbable by the body. বস্তু এটাৰ ধৰ্ম যিয়ে শৰীৰে শোষণ বা শোষণ কৰিব পৰা আঘাতপ্ৰাপ্ত বিকিৰণৰ অংশ নিৰ্ধাৰণ কৰে৷
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141. Chemistry(Proper Adj.-Neuter) not centered; having no centre. কেন্দ্ৰীভূত নহয়; কোনো কেন্দ্ৰ নথকা
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142. Chemistry(Material Noun-Neuter) a colourless, volatile, flammable, toxic, slightly water-soluble, liquid, aromatic compound, C6H6, obtained chiefly from coal tar: used in the manufacture of commercial and medicinal chemicals, dyes, and as a solvent for resins, fats, or the like. ৰংহীন, অস্বাভাৱিক, জ্বলনশীল, বিষাক্ত, সামান্য পানীত দ্ৰৱীভূত, তৰল, সুগন্ধি যৌগ, C6H6, মূলতঃ কয়লাৰ আলকাতৰাৰ পৰা পোৱা: বাণিজ্যিক আৰু ঔষধি ৰাসায়নিক পদাৰ্থ, ৰং আৰু ৰেজিন,হিচাপে ব্যৱহাৰ কৰা হয়
143. Chemistry(Material Noun-Neuter) a chemical, esp an enzyme, that initiates or increases the rate of a biochemical reaction. এটা ৰাসায়নিক পদাৰ্থ, বিশেষকৈ কোনো এনজাইম, যিয়ে জৈৱৰাসায়নিক বিক্ৰিয়াৰ হাৰ আৰম্ভ কৰে বা বৃদ্ধি কৰে৷
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144. Chemistry(Abstract Noun) the formation of chemical compounds by a living organism. জীৱিত জীৱৰ দ্বাৰা ৰাসায়নিক যৌগ গঠন৷
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145. Chemistry(Material Noun-Neuter) a colourless flammable gaseous alkane that exists in two isomeric forms, both of which occur in natural gas. এটা ৰংহীন জ্বলনশীল গেছীয় পদাৰ্থ যি দুটা আইছ`মেৰিক ৰূপত থাকে আৰু দুয়োটাই প্ৰাকৃতিক গেছত পোৱা যায়৷
146. Chemistry(Material Noun-Neuter) a gaseous element that has no smell or colour কোনো গোন্ধ বা ৰং নথকা গেছীয় ৰাসায়নিক মৌল
147. Chemistry(Material Noun-Neuter) a synthetic rubber made by a chemical process that is used for gloves and wet suits that resist oil, water etc. তেল, পানী আদি প্ৰতিৰোধী গ্লভছ আদি তৈয়াৰ কৰাৰ বাবে ব্যৱহাৰ কৰা ৰাসায়নিক প্ৰক্ৰিয়াৰে নিৰ্মিত কৃত্ৰিম ৰবৰ
148. Chemistry(Material Noun-Neuter) a family of alloys of nickel and chromium commonly used as resistance wire সাধাৰণতে ৰোধক তাঁৰ হিচাপে ব্যৱহাৰ কৰা নিকেল আৰু ক্ৰ'মিয়ামৰ মিশ্ৰণ
149. Chemistry(Material Noun-Neuter) a silvery-white hard and lustrous metal used in making coins, wires, stainless steel etc. মুদ্ৰা, তাঁৰ, ষ্টেইনলেছ ষ্টীল আদি তৈয়াৰ কৰাত ব্যৱহাৰ কৰা ৰূপালী ৰঙৰ কঠিন আৰু চিকচিকিয়া ধাতু
150. Chemistry(Material Noun-Neuter) a crystalline acid, that is a component of the vitamin-B complex, found in fresh meat, yeast etc. ভিটামিন-বি কমপ্লেক্সৰ এটা উপাদান এক প্ৰকাৰৰ স্ফটিকীয় এচিড, যিটো সতেজ মাংস, ঈষ্ট (এককোষী ভেঁকুৰ) আদিত পোৱা যায়
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151. ChemistryNeptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after. A neptunium atom has 93 protons and 93 electrons, of which seven are valence electrons. Neptunium metal is silvery and tarnishes when exposed to air. The element occurs in three allotropic forms and it normally exhibits five oxidation states, ranging from +3 to +7. Like all actinides, it is radioactive, poisonous, pyrophoric, and capable of accumulating in bones, which makes the handling of neptunium dangerous.
Although many false claims of its discovery were made over the years, the element was first synthesized by Edwin McMillan and Philip H. Abelson at the Berkeley Radiation Laboratory in 1940. Since then, most neptunium has been and still is produced by neutron irradiation of uranium in nuclear reactors. The vast majority is generated as... from wikipedia.org
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152. ChemistryNiobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Niobium oxidizes in Earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite. Its name comes from Greek mythology: Niobe, daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, which makes them difficult to distinguish.
English chemist Charles Hatchett reported a new element similar to tantalum in 1801 and named it columbium. In 1809, English chemist William Hyde Wollaston wrongly concluded that tantalum and columbium were identical. German chemist Heinrich Rose determined in 1846 that tantalum ores contain a second element... from wikipedia.org
153. ChemistryPolonium is a chemical element; it has symbol Po and atomic number 84. A rare and highly radioactive metal (although sometimes classified as a metalloid) with no stable isotopes, polonium is a chalcogen and chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Due to the short half-life of all its isotopes, its natural occurrence is limited to tiny traces of the fleeting polonium-210 (with a half-life of 138 days) in uranium ores, as it is the penultimate daughter of natural uranium-238. Though two longer-lived isotopes exist (polonium-209 with a half-life of 124 years and polonium-208 with a half-life of 2.898 years), they are much more difficult to produce. Today, polonium is usually produced in milligram quantities by the neutron irradiation of bismuth. Due to its intense radioactivity, which results in the radiolysis of chemical bonds and radioactive self-heating, its... from wikipedia.org
154. ChemistryA reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously.
a
A
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−
−
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155. ChemistryRhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. It has one of the highest melting and boiling points of any element. It resembles manganese and technetium chemically and is mainly obtained as a by-product of the extraction and refinement of molybdenum and copper ores. It shows in its compounds a wide variety of oxidation states ranging from −3 to +7.
Rhenium was originally discovered in 1908 by Masataka Ogawa, but he mistakenly assigned it as element 43 (now known as technetium) rather than element 75 and named it nipponium. It was rediscovered in 1925 by Walter Noddack, Ida Tacke and Otto Berg, who gave it its present name. It was named after the river Rhine in Europe, from which the earliest samples had been obtained and worked commercially.
Nickel... from wikipedia.org
156. ChemistryVacuum distillation or distillation under reduced pressure is a type of distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in their boiling points. This technique is used when the boiling point of the desired compound is difficult to achieve or will cause the compound to decompose. Reduced pressures decrease the boiling point of compounds. The reduction in boiling point can be calculated using a temperature-pressure nomograph using the Clausius–Clapeyron relation.
== Laboratory-scale applications ==
Compounds with a boiling point lower than 150 °C typically are distilled at ambient pressure. For samples with high boiling points, short-path distillation apparatus is commonly employed. This technique is amply illustrated in Organic Synthesis.
=== Rotary evaporation ===
Rotary evaporation is a common technique used in laboratories... from wikipedia.org
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157. ChemistryVacuum evaporation is the process of causing the pressure in a liquid-filled container to be reduced below the vapor pressure of the liquid, causing the liquid to evaporate at a lower temperature than normal. Although the process can be applied to any type of liquid at any vapor pressure, it is generally used to describe the boiling of water by lowering the container's internal pressure below standard atmospheric pressure and causing the water to boil at room temperature.
The vacuum evaporation treatment process consists of reducing the interior pressure of the evaporation chamber below atmospheric pressure. This reduces the boiling point of the liquid to be evaporated, thereby reducing or eliminating the need for heat in both the boiling and condensation processes. There are other advantages, such as the ability to distill liquids with high boiling points and avoiding decomposition of substances that are heat sensitive.
== Application ==
=== Food ===
When the process is applied to food... from wikipedia.org
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158. ChemistryA universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a solution.
== History ==
Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933.
== Composition ==
A universal indicator is usually composed of water, 1-propanol, phenolphthalein, sodium hydroxide, methyl red, bromothymol blue, sodium bisulfite, and thymol blue. The colours that indicate the pH of a solution, after adding a universal indicator, are:
The colors from yellow to red indicate an acidic solution, colors blue to violet indicate an alkaline solution and a green colour indicates that a solution is neutral.
Wide-range pH test papers with distinct colours for each pH from 1 to 14 are also available. Colour matching charts are supplied... from wikipedia.org
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159. ChemistryIn chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The concentration can refer to any kind of chemical mixture, but most frequently refers to solutes and solvents in solutions. The molar (amount) concentration has variants, such as normal concentration and osmotic concentration. Dilution is reduction of concentration, e.g., by adding solvent to a solution. The verb "to concentrate" means to increase concentration, the opposite of dilute.
== Etymology ==
Concentration-, concentratio, action or an act of coming together at a house on a farm in a single place, bringing black people as slaves to a common center, was used in post-classical Latin in 1550 or earlier, similar terms attested in Italian (1589), Spanish (1589), English (1606), French (1632).
== Qualitative description ==
Often... from wikipedia.org
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160. ChemistryIn organic chemistry, a condensation reaction is a type of chemical reaction in which two molecules are combined to form a single molecule, usually with the loss of a small molecule such as water. If water is lost, the reaction is also known as a dehydration synthesis. However other molecules can also be lost, such as ammonia, ethanol, acetic acid and hydrogen sulfide.
The addition of the two molecules typically proceeds in a step-wise fashion to the addition product, usually in equilibrium, and with loss of a water molecule (hence the name condensation). The reaction may otherwise involve the functional groups of the molecule, and is a versatile class of reactions that can occur in acidic or basic conditions or in the presence of a catalyst. This class of reactions is a vital part of life as it is essential to the formation of peptide bonds between amino acids and to the biosynthesis of fatty acids.
Many variations of condensation reactions exist. Common examples include the aldol condensation... from wikipedia.org
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161. ChemistryCondenser may refer to:
== Heat transfer ==
Condenser (heat transfer), a device or unit used to condense vapor into liquid. Specific types include:
HVAC air coils
Condenser (laboratory), a range of laboratory glassware used to remove heat from fluids
Surface condenser, a heat exchange installed in steam-electric power stations to condense turbine exhaust steam into water
Isolation condenser, an emergency passive system for cooling in some reactors (BWR/2, BWR/3 and SBWR series) in nuclear energy production
=== Steam engines ===
Condensing steam locomotive
Jet condenser
Surface condenser
== Other uses ==
Condensers for collecting atmospheric moisture:
Air well (condenser)
Atmospheric water generator
Condenser (optics), a lens which gathers visible light and directs it onto a projection lens to concentrate it
Capacitor, formerly called a condenser, an electrical device that stores energy
Condenser microphone, a capacitor-based microphone that converts sound waves into an electrical signal
Synchronous... from wikipedia.org
162. Chemistry(Abstract Noun) ny process which removes the gangue minerals from ore to produce a higher grade product, and a waste stream.
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163. ChemistryKrypton (from Ancient Greek: κρυπτός, romanized: kryptos 'the hidden one') is a chemical element; it has symbol Kr and atomic number 36. It is a colorless, odorless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Krypton is chemically inert.
Krypton, like the other noble gases, is used in lighting and photography. Krypton light has many spectral lines, and krypton plasma is useful in bright, high-powered gas lasers (krypton ion and excimer lasers), each of which resonates and amplifies a single spectral line. Krypton fluoride also makes a useful laser medium. From 1960 to 1983, the official definition of the metre was based on the wavelength of one spectral line of krypton-86, because of the high power and relative ease of operation of krypton discharge tubes.
== History ==
Krypton was discovered in Britain in 1898 by William Ramsay, a Scottish chemist, and Morris Travers, an English chemist, in residue left from evaporating... from wikipedia.org
164. ChemistryUric acid is a heterocyclic compound of carbon, nitrogen, oxygen, and hydrogen with the formula C5H4N4O3. It forms ions and salts known as urates and acid urates, such as ammonium acid urate. Uric acid is a product of the metabolic breakdown of purine nucleotides, and it is a normal component of urine. High blood concentrations of uric acid can lead to gout and are associated with other medical conditions, including diabetes and the formation of ammonium acid urate kidney stones.
== Chemistry ==
Uric acid was first isolated from kidney stones in 1776 by Swedish chemist Carl Wilhelm Scheele. In 1882, the Ukrainian chemist Ivan Horbaczewski first synthesized uric acid by melting urea with glycine.
Uric acid displays lactam–lactim tautomerism. Uric acid crystallizes in the lactam form, with computational chemistry also indicating that tautomer to be the most stable. Uric acid is a diprotic acid with pKa1 = 5.4 and pKa2 = 10.3. At physiological pH, urate predominates in solution.
== Biochemistry... == from wikipedia.org
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165. ChemistryUrobilinogen is a colorless by-product of bilirubin reduction. It is formed in the intestines by the bacterial enzyme bilirubin reductase. About half of the urobilinogen formed is reabsorbed and taken up via the portal vein to the liver, enters circulation and is excreted by the kidney.
Increased amounts of bilirubin are formed in hemolysis, which generates increased urobilinogen in the gut. In liver disease (such as hepatitis), the intrahepatic urobilinogen cycle is inhibited also increasing urobilinogen levels. Urobilinogen is converted to the yellow pigmented urobilin apparent in urine.
The urobilinogen in the intestine is directly reduced to brownish colour stercobilin, which gives the feces their characteristic color. It can also be reduced to stercobilinogen, which can then be further oxidized to stercobilin.
In biliary obstruction, below-normal amounts of conjugated bilirubin reach the intestine for conversion to urobilinogen. With limited urobilinogen available for reabsorption... from wikipedia.org
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166. ChemistryLeaching is the loss or extraction of certain materials from a carrier into a liquid (usually, but not always a solvent), and may refer to:
Leaching (agriculture), the loss of water-soluble plant nutrients from the soil; or applying a small amount of excess irrigation to avoid soil salinity
Leaching (chemistry), the process of extracting substances from a solid by dissolving them in a liquid
Leaching (metallurgy), a widely used extractive metallurgy technique which converts metals into soluble salts in aqueous media
Dump leaching, an industrial process to extract metals from ore taken directly from the mine and stacked on the leach pad without crushing
Heap leaching, an industrial process to extract metals from ore which has been crushed into small chunks
Tank leaching, a hydro metallurgical method of extracting valuable material from ore
In-situ leaching, a process of recovering minerals such as copper and uranium through boreholes drilled into the deposit
Leaching (pedology), the loss... from wikipedia.org
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167. ChemistryVapour density is the density of a vapour in relation to that of hydrogen. It may be defined as mass of a certain volume of a substance divided by mass of same volume of hydrogen.
vapour density = mass of n molecules of gas / mass of n molecules of hydrogen gas .
vapour density = molar mass of gas / molar mass of H2
vapour density = molar mass of gas / 2.01568
vapour density = 1⁄2 × molar mass
(and thus: molar mass = ~2 × vapour density)
For example, vapour density of mixture of NO2 and N2O4 is 38.3. Vapour density is a dimensionless quantity.
Vapour density = density of gas / density of hydrogen (H2)
== Alternative definition ==
In many web sources, particularly in relation to safety considerations at commercial and industrial facilities in the U.S., vapour density is defined with respect to air, not hydrogen. Air is given a vapour density of one. For this use, air has a molecular weight of 28.97 atomic mass units, and all other gas and vapour molecular weights are divided by this... from wikipedia.org
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168. ChemistryVapor pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance of particles escaping from the liquid (or solid) in equilibrium with those in a coexisting vapor phase. A substance with a high vapor pressure at normal temperatures is often referred to as volatile. The pressure exhibited by vapor present above a liquid surface is known as vapor pressure. As the temperature of a liquid increases, the attractive interactions between liquid molecules become less significant in comparison to the entropy of those molecules in the gas phase, increasing the vapor pressure. Thus, liquids with strong intermolecular interactions are likely to have smaller vapor pressures, with the reverse true for weaker interactions.
The vapor pressure of any substance... from wikipedia.org
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169. Chemistry(Verb-Trans.) purify (a liquid) by heating it so that it vaporizes, then cooling and condensing the vapour and collecting the resulting liquid.
170. Chemistry(Material Noun-Neuter) Rare earth elements are a set of seventeen chemical elements plus scandium and yttrium. These elements are lustrous and have specific electro-chemical properties বিৰল মৃত্তিকা মৌলসমূহ হ’ল সোতৰটা মৌলৰ এটা গোট আৰু ওপৰঞ্চি স্কেণ্ডিয়ামআৰু য়িট্ৰিয়াম৷ এই মৌলসমূহ সংদীপ্তিশীল আৰু বিশেষ বিদ্যুৎৰাসায়নিক ধৰ্ম আছে৷
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171. Chemistry(Abstract Noun) A graph showing the separation of complex mixtures that rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass, such as paper, gelatin, or magnesia.
Source: https://www.semanticscholar.org/paper/TOTAL-PETROLEUM-HYDROCARBONS-BY-GAS-CHROMATOGRAPHY-Cort%C3%A9s-Suspes/895bc0d4023203f4d4e93abebcc3c106de1f1a0b
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