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1
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
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The polymer, which can be stretched and remains its original status on releasing the force is

A
Bakelite.
B
Nylon 6, 6.
C
Buna-N.
D
Terylene.
2
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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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 sis-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 :

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true but (R) is not the correct explanation of (A).
C
(A) is true but (R) is false.
D
(A) is false but (R) is true.
3
JEE Main 2022 (Online) 28th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Which one of the following is NOT a copolymer?

A
Buna-S
B
Neoprene
C
PHBV
D
Butadiene-styrene
4
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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Which is true about Buna-N?

A
It is a linear polymer of 1, 3-butadiene.
B
It is obtained by copolymerization of 1, 3-butadiene and styrene.
C
It is obtained by copolymerization of 1, 3-butadiene and acrylonitrile.
D
The suffix N in Buna-N stands for its natural occurrence.
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