1.

(A)the octane numberofbranchedchainhydrocarbonis higherthanthatof unbranched chain hydrocarbon . ( R) thebranched chainhydrocarbonsare morevolatileascomparedto unbrachedchainhydrocarbons .

Answer»

if both(A) and (R ) are correct and ( R) is THECORRECT explanationof the(A)
ifboth(A) and (R ) are correct but ( R) is not thecorrectexplanationof the(A)
if (A) is correct but ( R) is INCORRECT
is (A)in incorrect but( R)is correct

Answer :B


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