1.

Assertion: p-Dichlorobenzene is less soluble in organic solvents than the corresponding o-isomer. Reason: o-Dichlorobenzene is polar while p-dichlorobenzene is non-polar.

Answer»

If both assertionn and reason are true, and reason is the true explanation of the ASSERTION.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and Reason are false.

Solution :Correct explanation. Being symmetrical, p-dichlorobenzene MOLECULES fit closely in the crystal lattice and hence has stronger INTERMOLECULAR forces of attraction than those of o-dichlorobenzene. As a result, large amount of ENERGY is needed to dissolve p- than o-isomer.


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