Q= OUT OF THE FOLLOWING WHICH HAVE ZERO DIPOLE MOMENT AND WHY,,,,explain??
A) 1,1-dichloroethylene
B) cis-1,2-dichloroethylene
C) trans-1,2-dichloroethylene
D) none of these

Dear User

The correct answer is C) trans-1,2-dichloroethylene

Dipole moment is the vector sum of all the bond moments. In trans-1,2-dichloroethylene the bond moment of both Cl and both H points in opposite direction and thus the bond moments are cancelled. Therefore, the net dipole moment is 0.

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1.

2&3. 

apply this cocept you will get the ans. i.e  trans-1,2-dichloroethylene..
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,, i am unable to post the pic.:/
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The dipole moment is the vector sum of all bond moments.
Bond moments cancel out in trans but do not cancel out in cis.
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