Science Quiz | General Knowledge Multiple Choice Questions and Answers | Page-18

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Questions
86 Lens is made up of
A Ordinary glass
B Pyrex glass
C Cobalt glass
D Flint glass

Answer: Option [D]
87 Among the following materials sound travels fastest in
A vacuum
B steel
C water
D air

Answer: Option [B]
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88 Kilowatt-hour is the unit of
A light
B energy
C force
D power

Answer: Option [B]
89 The head mirror used by ENT doctors is
A convex
B concave
C plane
D plano-convex

Answer: Option [B]
90 The word ‘insolation’ means
A insoluble matters
B matters which insulate
C incoming solar radiation
D none of the above

Answer: Option [C]

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