$A$ compound $X$ on heating with alcoholic $AgNO_3$ gives a white precipitate. Oxidation of $X$ gives an acid with the formula $C_8H_6O_4$,which easily forms a cyclic anhydride on heating. The compound $X$ is

Given below are two statements:
Statement $I$: $(Et)_2N-CH_2CH_2Cl$ will undergo alkaline hydrolysis at a faster rate than $(Et)_2CH-CH_2CH_2Cl$.
Statement $II$: Intramolecular substitution takes place first by involving the lone pair of electrons on nitrogen.
In the light of the above statements,choose the most appropriate answer from the options given below:

Chloroform is slowly oxidized by air in the presence of light to form:

In the above reaction,the maximum Saytzeff product will be obtained when $X$ is:

Which of the following chloro-compounds shows complete inversion of configuration during a reaction?

In the given reaction sequence,$(X)$ and $(Y)$ are: