Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	Network polymers are thermosetting.
Reason (R):	Network polymers have a high molecular mass.

1.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
2.	Both (A) and (R) are true and (R) is the correct explanation of (A).
3.	Both (A) and (R) are false.
4.	(A) is true but (R) is false.

HINT: Network polymers are thermosetting polymers .

Explanation:

Network polymers are thermosetting polymers because they can't be reused after heating once. Because of alter heating, it undergoes extensive cross-linking in molds and again becomes infusible. Network polymers have high molecular mass molecules.

Hence, Assertion and Reason both are correct statements But reason does not explain Assertion.

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