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Assertion : Dipole moment of p- chloronitrobenzene is less than p-nitrotoluene. Reason : In p-chloronitrobenzene, both vectors of dipole moment act in opposite direction.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In p-chloronitrobenzene, the individual dipole moments due to the chlorine atom and nitro group are in opposite directions and hence partially get cancelled. This reduces the overall dipole moment. Whereas, in p-nitrotoluene both the bond dipoles due to the methyl group and the nitro group are in the same direction and get added. So the option (1) is correct.
