Q.

Which one of the following molecules is non-polar but contains polar bonds in it ?

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a

BCl3

b

H2

c

NH3

d

CHCl3

answer is A.

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Detailed Solution

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B - Cl bond is polar because Cl is more electronegative than boron. BCl3 has no dipolemoment because of symmetry. Hence it is non-polar.

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