CBSE 2025 · Region 1 · Set 1 · Q14 · 1 mark
Assertion (A) : The boiling points of alkyl halides decrease in the order : $\displaystyle \mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$.
Reason (R) : The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Haloalkanes and HaloarenesPhysical Properties of Haloalkanes and HaloarenesUnderstandassertion_reasonmedium
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CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.