Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In this type of questions, a statement of assertion 
is followed by a statement of reason
(R). Mark the correct choice as:
Assertion : TEL is an antiknock compound.
Reason : TEL reduces the knocking property of a fuel.
Text Solution
Verified by ExpertsThe correct answer is:
B
TEL is used as an antiknock compound because it forms ethyl free radical which converts some of the straight chain hydrocarbons into branched chain hydrocarbons, and thus, increases the octane number.
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