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  3. Chemistry
  4. Assertion: p-dichlorobenzene is less soluble in organic solvents than the corresponding o-isomer. Reason: o-dichlorobenzene is polar while p-dichlorobenzene is not

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Q. Assertion: $p$-dichlorobenzene is less soluble in organic solvents than the corresponding $o$-isomer.
Reason: $o$-dichlorobenzene is polar while $p$-dichlorobenzene is not

AIIMSAIIMS 2011

Solution:

$p$-dichlorobenzene is more symmetrical than o-isomer, so fits closely in the crystal lattice and hence, greater amount of energy is needed to break the crystal lattice. Thus $p$-isomer is less soluble than o-isomer.