Question

${\mathrm{CH}}_4\left(g\right)+{\mathrm{Cl}}_2\left(g\right)\to {\mathrm{CH}}_3\mathrm{Cl}\left(g\right)+\mathrm{HCl}\left(g\right)$

Which of the following are true about the above reaction?

• A. The reaction is called chlorination of methane.
• B. It happens in the presence of UV light.
• C. One of the products formed is chloroethane.
• D. It requires a temperature of $2500{}^{0}C-3000{}^{0}C$.

Answer 1

Answer: (A), (B)

The correct options are
A The reaction is called chlorination of methane.
B It happens in the presence of UV light.

The given reaction is called chlorination of methane as the hydrogen atom in methane $\left(C{H}_4\right)$ is replaced by a chlorine atom. It happens in the presence of UV light or at a temperature between $250{}^{0}C-400{}^{0}C$. The products formed include chloromethane $\left(C{H}_{3}Cl\right)$ and hydrogen chloride $\left(HCl\right)$.

${\mathrm{CH}}_4\left(g\right)+{\mathrm{Cl}}_2\left(g\right)\stackrel{\mathrm{UV}\mathrm{light}}{\to }{\mathrm{CH}}_3\mathrm{Cl}\left(g\right)+\mathrm{HCl}\left(g\right)$