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.
(i) Assertion and reason both are correct statement but reason does not explain assertion.
(ii) Assertion and reason both are correct statements and reason explains the assertion.
(iii) Both assertion and reason are wrong statement.
(iv) Assertion is correct statement and reason is wrong statement. (v) Assertion is wrong statement and reason is correct statement.
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.
(i) Assertion and reason both are correct statement but reason does not explain assertion.
(ii) Assertion and reason both are correct statements and reason explains the assertion.
(iii) Both assertion and reason are wrong statement.
(iv) Assertion is correct statement and reason is wrong statement. (v) Assertion is wrong statement and reason is correct statement.
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1 Answer
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This is a assertion and reason answer type question as classified in NCERT Exemplar
(ii) Assertion and reason both are correct statements and reason explains the assertion.
Explanation: Polyamides are best used as fibres because of high tensile strength. They have the strongest intermolecular forces of attraction like hydrogen bonding. It lead to close packing of chains and increase the crystalline character.
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