Question:
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. $X$ is:
Correct Option: , 4
Solution:
$\mathrm{CCl}_{4} \rightarrow$ Non-conductor in solid and liquid phase.
Melting point of $\mathrm{CCl}_{4}$ is $-23{ }^{\circ} \mathrm{C}$. It does not conduct electricity in both solid and liquid state.