The number of all types of isomers of chlorobutane $(C_4H_9Cl)$ is:

Consider the following sequence of reactions:
Nitrobenzene $\xrightarrow[(ii) NaNO_2, HCl, 0^{\circ}C]{(i) Sn + HCl} \text{Benzenediazonium chloride}$ $\xrightarrow{(iii) Cu_2Cl_2} \text{Chlorobenzene}$ $\xrightarrow{(iv) Na, \text{Ether}} A$
Molar mass of the product formed $(A)$ is $.............. \ g \ mol^{-1}$.

Chlorination of substance $A$ gives substance $B$. Substance $B$ reacts with alcoholic $KOH$ to give substance $C$,which decolorizes Baeyer's reagent. Ozonolysis of substance $C$ gives $HCHO$. What is substance $A$?

The product $A$ is
$4-methylcyclohexyl bromide + OH^- \xrightarrow{S_N2} A$

Match List-$I$ with List-$II$:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$. $C_6H_5Cl + CH_3Cl + 2Na \rightarrow C_6H_5CH_3 + 2NaCl$ | $I$. Wurtz-Fitting reaction |
| $B$. $2C_6H_5Cl + 2Na \rightarrow C_6H_5-C_6H_5 + 2NaCl$ | $II$. Fitting reaction |
| $C$. $C_6H_5N_2^+Cl^- \xrightarrow{Cu_2Cl_2} C_6H_5Cl + N_2$ | $III$. Sandmeyer reaction |
| $D$. $C_2H_5Cl + NaI \rightarrow C_2H_5I + NaCl$ | $IV$. Finkelstein reaction |

Match the following reactions in List-$I$ with their major products in List-$II$.

List-$I$ (Reaction)	List-$II$ (Major product)
$A. \ CH_3CH=CH_2 \xrightarrow{HI}$	$I. \ 1\text{-bromo-}2\text{-phenylethane}$
$B. \ C_6H_5CH_2CH_3 \xrightarrow{Br_2/\Delta}$	$II. \ 1\text{-iodopropane}$
$C. \ C_6H_5CH=CH_2 \xrightarrow{HBr}$	$III. \ 2\text{-iodopropane}$
	$IV. \ 1\text{-bromo-}1\text{-phenylethane}$

The correct match is: