JEE Main 2021 — Practical Chemistry Question with Solution
JEE Main 2021 (24 Feb Shift 1)
Question
Given below are two statements:
Statement Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above statements, choose the most appropriate answer from the options given below.
Choose an option
Show full solutionCorrect option: B
Step-by-step explanation
(i) Blue cupric metaborate is reduced to colourless cuprous metaborate in a luminous flame
(ii) Cupric metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
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This is a previous-year question from JEE Main 2021, covering the Practical Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.