Choose the Best Answer · Q12
Q.Assertion: 2-methyl-1,3-butadiene is the monomer of natural rubber
Reason: Natural rubber is formed through anionic addition polymerisation.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Both assertion and reason are false.
Puducherry TnboardTextbookSubjectiveImportance★★★★★est
50% · 23/46 Questions
You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
Start your 14-day free trial to unlock the full solution →Step 1. Assertion check: the unit names natural rubber's monomer unit as "cis isoprene (2-methyl buta-1,3-diene)" directly in 15.4.5 -- so the assertion is TRUE.
Step 2. Reason check: the unit's only detailed addition-polymerisation mechanism worked through (15.4.2) is FREE-RADICAL polymerisation (used for styrene/polystyrene); it does not describe natural rubber's formation as an anionic addition polymerisation -- natural rubber forms biologically in the rubber tree, not through a lab-style anionic mechanism, so the reason is FALSE. …
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.