$A$ certain alkane is mixed with chlorine and irradiated with ultraviolet light. It yields only one monochloroalkane. Which alkane is it?

The Wurtz reaction of methyl iodide gives a chemical compound $X$. Which of the following reactions also produces $X$ as a product?

Anhydrous sodium acetate on heating with sodalime gives

Identify the type of reaction shown in the following chemical equation:
$C_6H_5CH_3 + Br_2 \xrightarrow{h\nu} C_6H_5CH_2Br + HBr$

The alkane which is next to methane in the homologous series can be prepared from which of the following reactions?
$I$. $2 CH_3 Br \xrightarrow[\text{dry ether}]{Na}$
$II$. $CH_3 COOH \xrightarrow[CaO, \Delta]{NaOH}$
$III$. $CH_3 CH=CH_2 \xrightarrow{H_2 / Pt}$
$IV$. $CH_3 CH_2 Br \xrightarrow[H^{+}]{Zn}$
Correct answer is

Give the methods of preparation of alkanes. Write the general reactions.