MCQ
Assertion(A): Natural rubber becomes strong and elastic when heated with sulphur.
Reason (R): Natural rubber is mixed with 3 – 5% sulphur and heated at 100 – 150°C causes cross linking of the cis – 1, 4 – polyisoprene chains through disulphide – s – s bonds.
Reason (R): Natural rubber is mixed with 3 – 5% sulphur and heated at 100 – 150°C causes cross linking of the cis – 1, 4 – polyisoprene chains through disulphide – s – s bonds.
- ✓Both A and R are correct and R explains A.
- BBoth A and R are correct but R does not explain A.
- CA is correct but R is wrong.
- DA is wrong but R is correct.