Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Rayon is a semi synthetic polymer and is taken as a better choice than cotton fabric.
Reason: Mechanical and aesthetic properties of cellulose can be improved by acetylation.

A
Assertion and reason both are correct statement but reason does not explain assertion.
✓
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
D
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: B.

Assertion and reason both are correct statements and reason explains the assertion.

Rayon is semi$-$synthetic polymer and is a better choice than cotton because properties of cellulose are improved by acetylation while processing.

View full question & answer→

MCQ 21 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: For making rubber synthetically, isoprene molecules are polymerised.
Reason: Neoprene $($a polymer of chloroprene$)$ is a synthetic rubber.

A
Assertion and reason both are correct statement but reason does not explain assertion.
B
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
✓
Assertion is wrong statement and reason is correct statement.

Answer

Correct option: D.

Assertion is wrong statement and reason is correct statement.

Natural rubber may be considered as a linear polymer of isoprene $(2-$methyl$-1, 3-$butadiene$)$ and is also called as cis$-1,4 –$polyisoprene.

View full question & answer→

MCQ 31 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Olefinic monomers undergo addition polymerisation
Reason: Polymerisation of vinylchloride is initiated by peroxides/ persulphates.

✓
Assertion and reason both are correct statement but reason does not explain assertion.
B
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
D
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: A.

Assertion and reason both are correct statement but reason does not explain assertion.

Olefins like ethene undergo addition polymerization to give polymer like polythene.

View full question & answer→

MCQ 41 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Network polymers are thermosetting.
Reason: Network polymers have high molecular mass.

✓
Assertion and reason both are correct statement but reason does not explain assertion.
B
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
D
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: A.

Assertion and reason both are correct statement but reason does not explain assertion.

Extensive cross linking during polymerisation leads to the formation of three-dimensional network which is hard, infusible and insoluble.

View full question & answer→

MCQ 51 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Most of the Synthetic polymers are not biodegradable.
Reason: Polymerisation process induces toxic character in organic molecules.

A
Assertion and reason both are correct statement but reason does not explain assertion.
B
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
✓
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: D.

Assertion is correct statement and reason is wrong statement.

Most of the synthetic polymers are not biodegradable. Because a large number of polymers are quite resistant to the environmental degradation processes and are thus responsible for the accumulation of polymeric solid waste materials.

View full question & answer→

MCQ 61 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Polyamides are best used as fibres because of high tensile strength.
Reason: Strong intermolecular forces $($like hydrogen bonding within polyamides$)$ lead to close packing of chains and increase the crystalline character, hence, provide high tensile strength to polymers.

A
Assertion and reason both are correct statement but reason does not explain assertion.
✓
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
D
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: B.

Assertion and reason both are correct statements and reason explains the assertion.

Polyamides like nylons are best used fibres. They have high tensile strength due to presence of strong inter molecular hydrogen bond.

View full question & answer→

MCQ 71 Mark

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Polytetrafluoroethene is used in making non$-$stick cookwares.
Reason: Fluorine has highest electronegativity.

✓
Assertion and reason both are correct statement but reason does not explain assertion.
B
Assertion and reason both are correct statements and reason explains the assertion.
C
Both assertion and reason are wrong statement.
D
Assertion is correct statement and reason is wrong statement.

Answer

Correct option: A.

Assertion and reason both are correct statement but reason does not explain assertion.

Teflon is manufactured by heating tetrafluoroethene with a free radical or persulphate catalyst at high pressures. It is chemically inert and resistant to attack by corrosive reagents. It is used in making oil seals and gaskets and also used for non-stick surface coated utensils.

View full question & answer→

Chemistry Assertion (A) & Reason (B) MCQ

Take a timed test