Write the balanced equation for the laboratory preparation of methane.

State one relevant reason for the following:

• Soda-lime is preferred to sodium hydroxide in the laboratory preparation of methane.

Hydrogenation of cyclohexene and benzene take place as shown below. The resonance energy of benzene is $-36 {\mathrm{kcalmol}}^{-1}$

The relationship between $\mathrm{x}$ and $\mathrm{y}$ is

Write a balanced chemical equation for the following:

• Producing ethane from bromo-ethane using $\mathrm{Zn}/\mathrm{Cu}$ couple in alcohol.

What is hydrogenation? What is its industrial application?