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Standard XII
Chemistry
Question

Assertion :CCl4 is a nonpolar molecule.
Reason: The dipole moments in CCl4 cancel each other out.
  1. Both assertion and reason are correct and reason is the correct explanation for assertion
  2. Both assertion and reason are correct but reason is not the correct explanation for assertion
  3. Assertion is correct but reason is incorrect
  4. Both assertion and reason are incorrect

A
Both assertion and reason are correct and reason is the correct explanation for assertion
B
Assertion is correct but reason is incorrect
C
Both assertion and reason are incorrect
D
Both assertion and reason are correct but reason is not the correct explanation for assertion
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Solution
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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 (Cl) 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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