On heating compound (A) gives a gas (B) which is a 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 :
Show Hint
- Pb(NO3)2
- (NH4)2Cr2O7
- NH4NO2
- NaN3
The Correct Option is A
Solution and Explanation
Which compounds give N2 on heating?
\(\mathrm{(NH_4)_2Cr_2O_7 \xrightarrow{\Delta} N_2 + Cr_2O_3 + 4H_2O}\)
\(\mathrm{NH_4NO_2 \xrightarrow{\Delta} N_2 + 2H_2O}\)
\(\mathrm{2NaN_3 \xrightarrow{\Delta} 2Na + 3N_2}\)
\(\mathrm{2Pb(NO_3)_2 \xrightarrow{\Delta} 2PbO + 4NO_2 + O_2}\), which gives NO2 and O2, not N2.
So A should not be Pb(NO3)2.
Answer: (1) Pb(NO3)2
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