Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Polymers

Question:

Case: Read the passage and answer the following questions

There are two broad types of polymerisation reactions, i.e., the addition or chain growth polymerisation and condensation or step-growth polymerisation. In chain-growth polymerisation, the molecules of the same monomer or different monomers add together on a large scale to form a polymer. This type of polymerisation is explained free radicle mechanism. Some important addition polymers are polythene and teflon. Condensation polymerisation or step-growth polymerisation generally involves a repetitive condensation reaction between two bi-functional or trifunctional monomeric units. Some important condensation polymers are nylon, Bakelite, and formaldehyde polymer. Copolymerisation is a polymerisation reaction in which a mixture of more than one monomeric species is allowed to polymerise and form a copolymer. Rubber and its derivatives are copolymers.

Which of the following is used as an initiator in the polymerisation of ethene?
Options:
Benzoyl peroxide
Tert-butyl peroxide
Acetyl peroxide
None of the above
Correct Answer:
Benzoyl peroxide
Explanation:
The polymerisation of ethene to polythene consists of heating or exposing to light a mixture of ethene with a small amount of benzoyl peroxide initiator