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In free radical mechanism, the step in which two very large free radicals combine with each other is called the _______ step.

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In free radical mechanism, the step in which two very large free radicals combine with each other is called the _______ step.

(a) chain initiating

(b) chain propagating

(c) chain growth

(d) chain terminating

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Question is from Types of Polymerisation Reactions in portion Polymers of Chemistry – Class 12

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Correct option is (d) chain terminating

Easy explanation: The final step in which the product radical react with each other to form a polymerised product is called the chain terminating step. The other two steps involve reaction of one free radical with the unsaturated molecule.

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