CBSE Class 8 Science Quiz | CBSE Class 8 Science Multiple Choice Questions(MCQs) with Answers

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Questions
61 Flow of electron is called
A Electroplating
B Electric current
C Electrodes
D Electrolyte

Answer: Electric current
62 Distilled water is
A Poor conductor
B Good conductor
C Both A and B
D None

Answer: Poor conductor
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63 Poor conductors are
A Plastics
B Clothes
C Wood
D All of these

Answer: All of these
64 Copper wire is a
A Good conductor
B Poor conductor
C Both A and B
D None of this

Answer: Good conductor
65 An electrolyte is
A a metal
B a solution
C a liquid that conducts current
D all of above

Answer: a liquid that conducts current
66 Adding common salt to distilled water makes it
A Good conductor
B Insulator
C No
D Both a and b

Answer: Good conductor
67 Electroplating is based on
A Magnetic effect of electricity
B Chemical effect of electricity
C Heating effect of electricity
D Physical effect of electricity

Answer: Chemical effect of electricity
68 Plastic wire is
A An insulator
B A conductor
C Both of these
D None of these

Answer: An insulator
69 Which substance give heat and light after combustion
A Flame
B Fuel
C Combustion
D None of these

Answer: Fuel
70 Like fuel the sun also provides heat and light. The process taking place in the sun is called
A Combustion
B Nuclear process
C Burning
D All of these

Answer: Nuclear process
71 Coal burns with ______
A Flame
B Only glow
C Both flame and glow
D None of these

Answer: Only glow
72 Burning of charcoal in a closed room will produce
A Carbon dioxide
B Nitrogen dioxide
C Carbon monoxide
D All of these

Answer: Carbon monoxide
73 The substances which have very low ignition temperature will
A Catch fire easily
B Will not catch fire
C Catch fire after some time
D None of these

Answer: Catch fire easily
74 CNG and LPG are the examples of
A Solid fuels
B Liquid fuels
C Gaseous fuels
D They are not fuels

Answer: Gaseous fuels
75 Ignition temperature is
A Lowest temperature at catch fire
B Higher temperature at catch fire
C Any temperature
D None of these

Answer: Lowest temperature at catch fire
76 Combustion is a
A Chemical process
B Physical process
C Both of these processes
D None of these processes

Answer: Chemical process
77 The products of combustion are
A Oxygen and water
B Carbon dioxide and water
C Only carbon dioxide
D Only oxygen

Answer: Carbon dioxide and water
78 There are following zones of a flame
A Two
B Three
C Four
D No any zone

Answer: No any zone
79 Leaves or fruits fall on the ground due to
A magnetic force
B gravitational force
C electrostatic force
D muscular force

Answer: gravitational force
80 Force acts on an object may change
A direction
B shape
C speed
D all of above

Answer: all of above

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