JEE Main 2021 — D And F Block Elements Question with Solution
From: JEE Main 2021 (Online) 24th February Morning Shift
Question
Given below are two statements :
Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement II : 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.
Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement II : 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: C
Correct answer
CBoth Statement I and Statement II are false
Step-by-step explanation
In presence of luminous flame, blue cupric metaborate is
reduced to colourless cuprous metaborate.
If non-luminous flame is present in reaction, cupric metaborate is obtained by heating boric anhydride with copper sulphate.
So, both statements are false.
If non-luminous flame is present in reaction, cupric metaborate is obtained by heating boric anhydride with copper sulphate.
So, both statements are false.
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