Explore topic-wise MCQs in Polymer Engineering.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Polymer Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

BF3 is ineffective to induce cationic polymerization in isobutylene when the reactants are moisture free. State true or false.

A. true
B. false
Answer» B. false
Discussion
2.

The magnitude of the negative activation energy for degree of polymerization is higher for true termination than that for the termination by transfer reactions. State true or false.

A. true
B. false
Answer» C.
Discussion
3.

What is the range of activation energy of overall polymerization of cationic polymerization?

A. -10 to +10 kcal/mol
B. -100 to +100 kcal/mol
C. -500 to +500 kcal/mol
D. -25 to +25 kcal/mol
Answer» B. -100 to +100 kcal/mol
Discussion
4.

What does the binding energy between the propagating ion and the gegen ion depend on?

A. nature of reaction media
B. nature of gegen ion
C. temperature of reaction
D. all of the mentioned
Answer» E.
Discussion
5.

WHAT_DOES_THE_BINDING_ENERGY_BETWEEN_THE_PROPAGATING_ION_AND_THE_GEGEN_ION_DEPEND_ON??$

A. nature of reaction media
B. nature of gegen ion
C. temperature of reaction
D. all of the mentioned
Answer» E.
Discussion
6.

The magnitude of the negative activation energy for degree of polymerization is higher for true termination than that for the termination by transfer reactions. State true or false.$

A. true
B. false
Answer» C.
Discussion
7.

What is the range of activation energy of overall polymerization of cationic polymerization?$

A. -10 to +10 kcal/mol
B. -100 to +100 kcal/mol
C. -500 to +500 kcal/mol
D. -25 to +25 kcal/mol
Answer» B. -100 to +100 kcal/mol
Discussion
8.

How is the rate of cationic polymerization reaction affected with the increase in the dielectric constant of the reaction medium?

A. increase
B. decreases
C. may increase or decrease
D. no effect
Answer» B. decreases
Discussion
9.

BF3 is ineffective to induce cationic polymerization in isobutylene when the reactants are moisture free. State true or false.

A. true
B. false
Answer» B. false
Discussion
10.

What is true about the degree of cationic polymerization when termination occurs by monomer transfer?

A. constant
B. proportional to monomer concentration
C. proportional to catalyst concentration
D. proportional to square of monomer concentration
Answer» B. proportional to monomer concentration
Discussion
11.

How is the rate of polymerization dependent on the concentration of catalyst in cationic polymerization?

A. proportional to first power
B. proportional to half power
C. proportional to second power
D. no dependence
Answer» B. proportional to half power
Discussion
12.

How does degree of polymerization affected with increase in temperature of cationic polymerization reaction?

A. increases
B. decreases
C. no change
D. cannot be determined
Answer» C. no change
Discussion
13.

What kind of substituent groups should be attached to the monomer, readily undergoing cationic polymerization?

A. electron accepting
B. electron releasing
C. all of the mentioned
D. none of the mentioned
Answer» C. all of the mentioned
Discussion
14.

Which of the following monomer has highest reactivity towards cationic polymerization?

A. isobutylene
B. isoprene
C. vinyl ethers
D. styrene
Answer» D. styrene
Discussion
15.

Which of the following nature of solvent or additives can inhibit the growth in cationic polymerization?

A. basic
B. acidic
C. neutral
D. none of the mentioned
Answer» B. acidic
Discussion
16.

Which of the following type of termination is not possible in ionic polymerization?

A. bimolecular termination
B. unimolecular termination
C. termination through transfer to monomer or solvent
D. none of the mentioned
Answer» B. unimolecular termination
Discussion
17.

Which of the following polymerization mechanism can polymerize the styrene monomer?

A. cationic polymerization
B. radical polymerization
C. anionic polymerization
D. all of the mentioned
Answer» E.
Discussion