MCQ
When benzoic acid is treated with $PC{l_5}$ at $100\,^o C$, it gives
- ✓Benzoyl chloride
- B$o-$ chlorobenzoic acid
- C$p-$ chlorobenzoic acid
- DBenzyl chloride
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$(A)$ Total number of valence shell electrons at metal centre in $Fe ( CO )_5$ or $Ni ( CO )_4$ is $16$
$(B)$ These are predominantly low spin in nature
$(C)$ Metal-carbon bond strengthens when the oxidation state of the metal is lowered
$(D)$ The carbonyl $C - O$ bond weakens when the oxidation state of the metal is increased