Question

Assertion: Natural form of rubber is cis 1,4 polyisoprene

Reason: There are weak vander waals forces giving its coiled structure

(a) Both assertion and reason are true, reason is correct explanation of assertion.

(b) Both assertion and reason are true, but reason is not a correct explanation of assertion.

(c) Assertion is true, but reason is false

(d) Assertion is false, but reason is true

Answer 1

(b) Both assertion and reason are true, but reason is not a correct explanation of assertion.

Both assertion and reason are true, but reason is not correct explanation of A

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.

The cis-polyisoprene molecule consists of various chains held together by weak van der Waals interactions and has a coiled structure. Thus. It can be stretched like a spring and exhibits elastic properties.