Assertion : $C C l_{4}$ is a nonpolar molecule.
Reason: The dipole moments in $C C l_{4}$ cancel each other out.

Both assertion and reason are correct and reason is the correct explanation for assertion

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Both assertion and reason are correct but reason is not the correct explanation for assertion

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Assertion is correct but reason is incorrect

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Both assertion and reason are incorrect

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Solution

The correct option is A Both assertion and reason are correct and reason is the correct explanation for assertion
The geometry of a carbon tetrachloride molecule is tetrahedral. The molecule consists of a central $C$ atom, which has a coordination number of 4. Four chloride ( $C l$ ) atoms can bond to $C$ . When they do, they assume a geometry around the $C$ , in such a way as to put maximum distance between themselves/each other, and minimize repulsion. This results in a tetrahedral configuration. Therefore, the molecule has no net dipole moment. They all sort of cancel each other out. So, a nonpolar molecule can have polar bonds, but due to symmetry in the molecule, there are no net poles.

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Assertion :CCl4 is a nonpolar molecule. Reason: The dipole moments in CCl4 cancel each other out.

Assertion : $C C l_{4}$ is a nonpolar molecule.
Reason: The dipole moments in $C C l_{4}$ cancel each other out.