The major product $Q$ of the following reaction scheme is:

Both ethanal and propanone will react with which of the following?

In which of the following groups does each member give a positive iodoform test?

Give the best conditions for this transformation:

Explain the reactivity of nucleophilic addition reactions of aldehyde and ketone compounds.

In the following reactions,$P, Q, R$,and $S$ are the major products.
The correct statement$(s)$ about $P, Q, R$,and $S$ is(are):
$(A)$ Both $P$ and $Q$ have asymmetric carbon$(s)$.
$(B)$ Both $Q$ and $R$ have asymmetric carbon$(s)$.
$(C)$ Both $P$ and $R$ have asymmetric carbon$(s)$.
$(D)$ $P$ has asymmetric carbon$(s)$,$S$ does not have any asymmetric carbon.