Polymer Science and Technology

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Multiple Choice

Assertion: Natural rubber is a cis-1,4-polyisoprene.
Reason: On vulcanization, rubber becomes softer.

Directions: In the following question there are two statements, Assertion (A) and Reason (R), consider both the statements independently and mark your answers as under:
A and R both are correct and R is correct explanation of A.
A and R both are correct and R is not correct explanation of A.
A is correct and R is incorrect.
A is incorrect and R is correct.
A and R both are incorrect.

  1. A and R both are correct and R is the correct explanation of A.
  2. A and R both are correct and R is not the correct explanation of A.
  3. A is correct and R is incorrect.
  4. A is incorrect and R is correct.
  5. A and R both are incorrect.
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