পাৰক্ল`ৰিক এছিডপাৰখোৱা
পাৰক্ল`ৰেট (Assamese)
1. A perchlorate is a chemical compound containing the perchlorate ion, ClO−4, the conjugate base of perchloric acid (ionic perchlorate). As counterions, there can be metal cations, quaternary ammonium cations... from wikipedia.org