Given below are two statements, one is Assertion (A) and other is Reason (R).
Assertion (A): Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties. Reason (R): The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure.
In the light of the above statements, choose the correct one from the options given below:
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true but (R) is false.
(A) is false but (R) is true.
Show Solution
The Correct Option isC
Solution and Explanation
To solve this question, we need to analyze the given assertion and reason statements about natural rubber and determine their validity.
The Assertion (A) states that natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties. This statement is true because natural rubber consists of long chains of isoprene units linked together in a linear fashion, with the double bonds in the cis configuration, which contributes to its elasticity.
The Reason (R) claims that the cis-polyisoprene molecules consist of various chains held together by strong polar interactions with a coiled structure. This statement is false. In reality, the molecules in natural rubber are held together primarily by weak van der Waals forces, not by strong polar interactions. Additionally, while the polymer chains can exhibit an inherent coiled nature, it is the cis configuration that allows for flexibility and entanglement, giving rise to elasticity, not strong polar interactions.
