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Free download in PDF CBSE Class 12 Chemistry MCQs with Answers. Here Gkseries provide Chemistry Solve Questions and Answers for CBSE Class 12 Students.
101
Natural rubber in a polymer of
[A]
Isoprene
[B]
Styrene
[C]
Butadiene
[D]
Ethyne
102
Zeigler – Natta catalyst is used in making
[A]
LDPE
[B]
HDPE
[C]
PMMA
[D]
Polystyrene
103
The commercial name of polyacrylonitrile is __________ .
[A]
Orion (acrilan)
[B]
Bakelite
[C]
Dacron
[D]
PVC
104
Which of the following is not a semisynthetic polymer?
[A]
Vulcanised rubber
[B]
cw-polyisoprene .
[C]
Cellulose nitrate
[D]
Cellulose acetate
Answer: cw-polyisoprene .
105
Novolac, the linear polymer used in paints is
[A]
copolymer of melamine and HCHO
[B]
condensation polymer of phenol and HCHO
[C]
copolymer of buta 1, 3-diene and styrene
[D]
polymer of methyl methacrylate
Answer: condensation polymer of phenol and HCHO
106
The polymer containing strong intermolecular H-bonding and crystalline nature is
[A]
Nylon 6, 6
[B]
Teflon
[C]
Polystyrene
[D]
Natural rubber
107
The polymer which is used in manufacture of squeeze bottles is
[A]
Polypropene
[B]
Low density polythene
[C]
Polystyrene
[D]
Teflon
Answer: Low density polythene
108
Which of the following is not correct regarding terylene?
[A]
Thermosetting plastic
[B]
also called dacron
[C]
Step growth polymer
[D]
Synthetic fibre
Answer: Thermosetting plastic
109
The polymer used in orthopaedic devices and in controlled drug release is
[A]
PHBV
[B]
Orion
[C]
PTFE
[D]
SBR
110
Caprolactum is used for preparation of
[A]
Nylon-2 – Nylon-6
[B]
Nylon-6,6
[C]
Nylon-6
[D]
Nylon 6, 10
111
Which of the following is thermosetting polymer
[A]
Bakelite
[B]
Nylon-6,6
[C]
Neoprene
[D]
PVC
112
Which of the following has ester linkages?
[A]
Terylene
[B]
PVC
[C]
Bakelite
[D]
Nylon
113
Which of the following statements is not true?
[A]
Natural rubber is frans-polyisoprene
[B]
Vulcanisation makes rubber hard due to cross linkages with sulphur.
[C]
Buna-S is addition copolymer of butadiene and styrene
[D]
Natural rubber is cis 1, 4-polymer of isoprene
Answer: Natural rubber is frans-polyisoprene
114
The monomer of polystyrene is
[A]
C6H5CH=CH2
[B]
CH2=CH—CHO
[C]
C2H —CH=CH2
[D]
CH2=CHCl
115
The vitamin present in oils and fats are
[A]
A and C
[B]
A and D
[C]
B and C
[D]
A and B
116
RNA and DNA are chiral molecules, their chirality is due to
[A]
chiral bases
[B]
chiral phosphate units
[C]
D-sugar component
[D]
L-sugar component
Answer: D-sugar component
117
Glucose does not react with
[A]
(CH3CO)2O
[B]
NaHSO3
[C]
NH2OH
[D]
Cone. HNO3
118
A basic amino acid among the following is
[A]
histidine
[B]
leucine
[C]
glycine
[D]
valine
119
Which of the following is non-reducing sugar?
[A]
Sucrose
[B]
Lactose
[C]
Glucose
[D]
Maltose
120
Which of the following statements is not correct?
[A]
Denaturation makes the proteins more active.
[B]
Insulin maintains sugar level in the blood of a human body.
[C]
Blood proteins thrombin and fibrinogen are involved in blood clotting.
[D]
Ovalbumin is a simple food reserve in egg white.
Answer: Denaturation makes the proteins more active.
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