for question 12, i feel that NO2 does not catalyse th reaction,
it merely forms acid rain. NO2 + h20 = HN02 + HNO3
even at same temp, acyl chloride should still hydrolyse faster.
assuming same amount of time, yield from acyl chloride should be
higher.
Q12 - I've already edited the answer list.
Qn 23 - it didn't specify % yield if reaction is
incomplete, it implied reaction is complete for all options (except
C, which requires exceptionally high temperatures and
pressures).
But as I said, this qn (together with a couple
of others) is ambiguous, so it's anyone's guess which
answer Cambridge prefers.
