Question

Melts at low temperature and is a bad conductor of electricity in both liquid and solid state, $X$ is:
A. Zinc sulphide
B. Mercury
C. Carbon tetrachloride
D. Silicon carbide

Answer 1

To know the exact substitution for $X$ , we should go through the explanation of each and every option separately and their properties including chemical and physical properties. And then we will also discuss that compound.

Complete step by step solution:
The melting point of carbon tetrachloride is $- {22.92^\circ }C$ .
The dipole moment is zero. Hence, it is a nonpolar compound. As there is no charge separation in the molecule, therefore this compound is a bad conductor of electricity and is solid as used as the liquid state.
A compound composed of molecules that possess a symmetric distribution of charge, so that no positive or negative poles exist, and that are not ionizable in solution, for example, hydrocarbons.
When referring to compound polarity, it's best to avoid confusion and call them nonpolar, polar covalent, and ionic. Nonpolar Molecules When molecules share electrons equally in a covalent bond there is no net electrical charge across the molecule.
Hence, the correct option is C. Carbon tetrachloride.

Note:
Carbon tetrachloride, a colourless, dense, highly toxic, volatile, nonflammable liquid possessing a characteristic odour and belonging to the family of organic halogen compounds, used principally in the manufacture of dichlorodifluoromethane (a refrigerant and propellant).