General Science Multiple Choice Questions and Answers for Staff Selection Commission Exams

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Questions
86 At sun rise or sun set, the sun appears to be reddish while at mid day it looks white. This is because :
A The sun is colder at sun rise and sun-set
B At sun rise or sun-set it is nearer to the earth
C At sun rise it is fresh and at sun-set it is about to be set
D Scattering due to dust particles and air molecules causes this phenomenon.

Answer: Option [D]
87 In cage of a chemical change, what is generally affected ?
A Neutron
B Nucleus
C Proton
D Electron

Answer: Option [D]
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88 Who invented the Transistor ?
A Edward Jenner
B J. Whinfield and J. Dickson
C Bardeen, Shockey and Brattain
D Banting, Macleod and Best

Answer: Option [C]
89 Energy can be released by an atomic fusion when :
A They have mutual repulsion
B The atoms fused have mutual attraction
C The nuclear mass of the atom formed is less than the combined mass of the atoms fused
D The nuclear mass of the atom formed is greater than the combined nuclear mass of fused atoms

Answer: Option [C]
90 The malarial parasite is transmitted to man by :
A The ice
B The flea
C The mosquito
D The fly

Answer: Option [C]

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