JEE Main Chemistry question
In how many of the following is the dipole moment () non-zero? cis-1,2-dichloroethene, 1,2-dichlorobenzene, trans-1,2-dichloroethene, 1,4-dichlorobenzene, trans-pent-2-ene
Answer: 3
Solution
cis-1,2-dichloroethene (both Cl on the same side, dipoles reinforce) and 1,2-dichlorobenzene (ortho, adjacent substitution) both have a net dipole. trans-1,2-dichloroethene and 1,4-dichlorobenzene (para) are both symmetric, with the two
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