Acetaldehyde, when heated in the presence of sodium hydroxide and $I_2$, forms:

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is

The major product obtained in the following reaction is

The given alkene undergoes ozonolysis: $2\text{-methylbut-2-ene}$ $\xrightarrow[{(2)\ H_2O/Zn}]{{(1)\ O_3}} \mathop X\limits_{(C_2H_4O)} + \mathop Y\limits_{(C_3H_6O)}$
$X \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} P$
$Y \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} Q$
Which of the following statements is incorrect for $X$,$Y$,$P$,and $Q$?

Compare the stability of the enolate formed from $A$ (cyclohexane$-1,3-$dione) and $B$ (cyclohexane$-1,4-$dione).
Which of the following statements is true?

Which of the following,on reaction with $50\%\,KOH$,gives the corresponding alcohol and acid salt?