1
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following is an example of polyester?

A
Butadiene-styrene copolymer
B
Melamine polymer
C
Neoprene
D
Poly-$$\beta$$-hydroxybutyrate-co-$$\beta$$-hydroxyvalerate
2
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A polysaccharide 'X' on boiling with dil H2SO4 at 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine water gives gluconic acid. 'X' contains $$\beta$$-glycosidic linkages only. Compound 'X' is :

A
starch
B
cellulose
C
amylose
D
amylopectin
3
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Monomer units of Dacron polymer are :
A
ethylene glycol and phthalic acid
B
ethylene glycol and terephthalic acid
C
glycerol and terephthalic acid
D
glycerol and phthalic acid
4
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which among the following is not a polyester?
A
Novolac
B
PHBV
C
Dacron
D
Glyptal
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