Question

On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with H₂ in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be: 

(1) (NH₄)₂Cr₂O₇ 

(2) Pb(NO₃)₂ 

(3) NaN₃ 

(4) NH₄NO₂

Answer 1

Answer is (2) Pb(NO₃)₂

Basic gas (C) must be ammonia (NH₃). It means (B) gas should be N₂ which is formed by heating of compound (A).

So, (A) should not be Pb(NO₃)₂