NCERT Class 12 Chemistry Competitive Exams Questions and Answers
NCERT Class 12 Chemistry
QUESTIONS
NCERT Class 12 Chemistry Competitive Exams Questions and Answers
81 In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2 solution is _________ .
A the same
B about twice
C about three times
D about six times
Answer: about three times
82 Which of the following polymer is stored in the liver of animals?
A Glycogen
B Amylopectin
C Amylose
D Cellulose
Answer: slope of velocity-time graph
83 At 100°C, the vapour pressure of a solution of 6.5 g of solute in 100 g of water is 732 mm. If Kb is 0.52 K/m, the boiling point of solution will be [HOTS]
A 102°C
B 103°C
C 101 °C
D 100°C
84 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
85 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
86 Caprolactum is used for preparation of
A Nylon-2 – Nylon-6
B Nylon-6,6
C Nylon-6
D Nylon 6, 10
87 Which of the following is thermosetting polymer
A Bakelite
B Nylon-6,6
C Neoprene
D PVC
88 People add sodium chloride to water while boiling eggs. This is to
A increase the boiling point.
B prevent the breaking of eggs.
C decrease the boiling point.
D make eggs tasty.
Answer: increase the boiling point.
89 Which of the following has ester linkages?
A Terylene
B PVC
C Bakelite
D Nylon
90 The polymer used in orthopaedic devices and in controlled drug release is
A PHBV
B Orion
C PTFE
D SBR