Identify $(Z)$ in the following reaction:
$CH_3COOH$ $\xrightarrow{LiAlH_4} (X)$ $\xrightarrow{573 \ K, \ Cu} (Y)$ $\xrightarrow{dil.NaOH} (Z)$

The minimum number of carbon atoms in ketones which will show chain isomerism is:

Given below are two statements: Statement $I$: The condensation reaction between $CH_{3} - CH = O$ and $H_{2}N - NH - C(=O) - NH_{2}$ under optimum pH will produce $CH_{3} - CH = N - N(H) - C(=O) - NH_{2}$. Statement $II$: The molecule,$Ph - CH(OH)(OCH_{3})$ will generate $Ph - CH = O$ in the presence of dilute acid. In the light of the above statements,choose the correct answer from the options given below:

The major product of the following reaction is

An alkene $(A)$ $C_{16}H_{16}$ on ozonolysis gives only one product $(B)$ $C_8H_8O$. $(B)$ can also be obtained by the hydrolysis of the product obtained from the reaction between cyanobenzene and $CH_3MgBr$. $(A)$ shows geometrical isomerism and decolourises $Br_2$ water. $(B)$ on treatment with $SeO_2$ produces $(C)$. Which statement is not correct about $(C)$?

Which of the following compounds does not react with $NaHSO_3$?