The reagent used for the preparation of higher ether from halogenated ethers is

In the following reaction,$C_2H_5OC_2H_5 + 4[H] \xrightarrow{\text{Red } P + HI} 2X + H_2O$,$X$ is

Which of the following compounds will $NOT$ yield benzoic acid upon oxidation with alkaline $KMnO_4$ followed by heating?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis.
Reason $(R):$ Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether.
In the light of the above statements,choose the most appropriate answer from the options given below:

The structure of diethyl ether is confirmed by

In the reaction $CH_3-CH(CH_3)-CH_2-O-CH_2-CH_3 + HI \xrightarrow{\text{Heated}} \dots$,which of the following compounds will be formed?