KCET 2021 Chemistry Solved Paper

Compound (Y) gives iodoform test, that means it
contains acetyl group (CH3−

O

|| C

−).
PCC is an oxidising agent which oxidised the alcohol to aldchyde or ketone (depends upon the reactant alcohol). That means X is an alcohol.
From the given information, it is concluded that the compound X is an alcohol (which contain two carbon). Thus, the alcohol is CH3CH2‌OH.
The reaction involves arc as follows :