The major product formed when $1, 1, 1-$trichloropropane is treated with aqueous potassium hydroxide is:

Compare the two methods shown for the preparation of carboxylic acids.
Method $1$: $RBr$ $\xrightarrow[diethyl \ ether]{Mg} RMgBr$ $\xrightarrow[2. \ H_3O^{+}]{1. \ CO_2} RCO_2H$
Method $2$: $RBr$ $\xrightarrow{NaCN} RCN$ $\xrightarrow[heat]{H_2O, HCl} RCO_2H$
Which one of the following statements correctly describes this conversion for the given substrate ($1$-bromoadamantane)?

What is the name of the reaction: $CH_3-CH=CH_2 \xrightarrow{CO + H_2O, H^+} CH_3-CH(COOH)-CH_3$?

Give the method of preparation of carboxylic acid from the reaction of a Grignard reagent with $CO_2$ with suitable examples.

Which one of the following functional groups undergoes hydrolysis with alkali to yield an acid group?

Benzoyl chloride is prepared from benzoic acid by: