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Questions
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1
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Consider the Assertion and Reason given below.

Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins.

Reason (R) : High density polymers are closely packed and are chemically inert.

Choose the correct answer from the following:
A
Both (A) and (R) are correct and (R) is the correct explanation of (A).
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
C
(A) is correct but (R) is wrong.
D
(A) and (R) both are wrong.
2
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Which one of the following polymers is not obtained by condensation polymerisation?
A
Bakelite
B
Nylon 6
C
Buna-N
D
Nylon 6, 6
3
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Which polymer has 'chiral' monomer(s) ?
A
Nylon 6,6
B
Buna-N
C
PHBV
D
Neoprene
4
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Preparation of Bakelite proceeds via reactions.
A
Electrophilic substitution and dehydration
B
Condensation and elimination
C
Nucleophilic addition and dehydration
D
Electrophilic addition and dehydration
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