Question

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

• A. If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion
• B. If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion
• C. If Assertion: is true but Reason: is false
• D. If both Assertion: and Reason: are false

Answer 1

Answer: (B)

$p$-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.