MEDIUM
Earn 100
Dry ice used for the:
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Important Questions on Substances in the Surroundings-Their States and Properties
EASY
Which of the following is not an example of a biomass energy source?
EASY
Write down the process of evolution of fossil fuels on Earth.
MEDIUM
Write a short note on: Nuclear Energy
MEDIUM
Explain how is nuclear energy generated in power reactors. How is electricity produced from nuclear energy?
EASY
By what name is biogas popularly known in India?
MEDIUM
List any three differences between nuclear fission reaction and nuclear fusion reaction.
MEDIUM
Useful substance in preparation of freezing mixture is
EASY
Uranium is used to obtain:
EASY
Which of the following is not an example of a bio-mass energy source?
EASY
State two ways to prevent the rusting of iron.
EASY
Write names of any two energies produced in ocean.
MEDIUM
Which of the following are physical changes?
(a) Melting of iron metal (b) Rusting of iron
(c) Bending of an iron rod (d) Drawing a wire of iron metal
EASY
Write the name of two elements used as nuclear energy.
EASY
Which one of the following is an example of Biomass energy source.
MEDIUM
Write any four differences between nuclear fusion and nuclear fission.
EASY
Nowadays bio-diesel is used in transportation vehicles as an alternate to diesel. Write two advantages of this measure.
EASY
Write down the two benefits of use of solar energy.
MEDIUM
How is paper manufactured? Write in your own words.
MEDIUM
Find things in your classroom or home made of paper.
