The compound $A$ (major product) is

$A$ compound $A$ $(C_5H_{10}Cl_2)$ on hydrolysis gives $C_5H_{10}O$ which reacts with $NH_2OH$,forms iodoform,but does not give Fehling's test. $A$ is:

In nucleophilic aliphatic substitution,the nucleophiles are generally

An alcoholic solution of $KOH$ is a specific reagent for which of the following reactions?

The major product of the following reaction is $CH_3-CH(CH_3)-CH(Br)-CH_3 \xrightarrow{CH_3OH}$

In the reaction shown,the major product obtained is: