Which of the reagent is used to convert $2-Butanone$ into propanoic acid?

Which compound does not form iodoform with alkali and iodine?

Which reaction is correctly matched with its name?

The aldehydes which will not form a single Grignard product with one equivalent of Grignard reagent are:
$(a)$ Benzaldehyde
$(b)$ $4$-Formylbenzoic acid
$(c)$ $4$-Methoxybenzaldehyde
$(d)$ $4$-(Hydroxymethyl)benzaldehyde

Which of the following reactions involve the carbon-carbon bond formation?

Choose the reactant whose aldol reaction would give jasmone.