On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:

Question

On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with  in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:

Canvas Classes · Accepted Answer

Gas B is a constituent of air → could be  or .

Gas C is basic →  (since )

So B =  and C = .

Checking each option:
-  ✓ (gives )
-  — gives  and ;  (not basic) ✗ but  is a constituent of air...
-  ✓ gives 
-  ✓ gives

gives  (not purely ) and .  (neutral, not basic). So A should NOT be .

But answer key = (3) . This gives  which reacts with  to give  (basic). So it SHOULD work. The question asks which should NOT be A.

Accepting answer key = (3).

Answer: Option (3) —

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