What is $Z$ in the following reaction?
$CH_3-CH_2-CO_2^{\ominus} Na^{\oplus} \stackrel{NaOH / CaO}{\longrightarrow} Z$

The preparation of ethane by electrolysis of an aqueous solution of potassium acetate is called as:

$A$ hydrocarbon $C_{5}H_{10}$ does not react with chlorine in the dark but gives a single monochloro compound $C_{5}H_{9}Cl$ in bright sunlight. Identify the hydrocarbon.

Which of the following is the best method for the preparation of methane?

$A$ compound $A$ contains $C$ and $H$ only and has a molecular mass of $72$. Its photochlorination gives a mixture containing only one monochloro and two dichloro hydrocarbons. What is its $IUPAC$ name?

In the following reaction,the major product is
$H_2C=C(CH_3)-CH=CH_2 \xrightarrow{1 \text{ equivalent } HBr}$