Consider the following reaction:
$CH_3CH_2OH$ $\xrightarrow{PBr_3} X$ $\xrightarrow{alc. KOH} Y$ $\xrightarrow[(ii) H_2O, \text{heat}]{(i) H_2SO_4, \text{room temperature}} Z$
The product $Z$ is

The major product of the following reaction is:

$A$ compound is soluble in concentrated ${H_2SO_4}$. It does not decolorize a solution of bromine in ${CCl_4}$. However,it is oxidized by chromic anhydride in aqueous sulfuric acid within two seconds,changing the color of the solution from orange to blue,green,and finally opaque. What does the original compound contain?

Which of the following statements is incorrect for alcohols?

Which of the following is a tertiary allylic alcohol?

Compound $(x)$ with molecular formula $C_4H_8O$ gives a positive haloform test but does not give a $2,4-DNP$ test. The compound is: