MCQ
Pure nitrogen can be prepared from
- A$N{H_4}OH$
- B$C{a_3}{N_2}$
- ✓$N{H_4}N{O_2}$
- D$Ba{(N{O_3})_2}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

The correct statement ($s$) about $P, Q, R$, and $S$ is (are)
($A$) $P$ and $Q$ are monomers of polymers dacron and glyptal, respectively.
($B$) $P, Q$, and $R$ are dicarboxylic acids.
($C$) Compounds $Q$ and $R$ are the same.
($D$) $R$ does not undergo aldol condensation and $S$ does not undergo Cannizzaro reaction.