MEDIUM
Earn 100

Which among the following compound(s) is / are present in toothpastes?

50% studentsanswered this correctly

Important Questions on Materials we Use

EASY
Science>Chemistry>Materials we Use>Toothpaste
Which of the following is not an example of a biomass energy source?
EASY
Science>Chemistry>Materials we Use>Toothpaste
Name two uses biogas.
EASY
Science>Chemistry>Materials we Use>Toothpaste
Write down the process of evolution of fossil fuels on Earth.
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
Write a short note on: Nuclear Energy
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
Explain how is nuclear energy generated in power reactors. How is electricity produced from nuclear energy?
EASY
Science>Chemistry>Materials we Use>Toothpaste
By what name is biogas popularly known in India?
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
List any three differences between nuclear fission reaction and nuclear fusion reaction.
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
Useful substance in preparation of freezing mixture is 
EASY
Science>Chemistry>Materials we Use>Toothpaste
Uranium is used to obtain:
EASY
Science>Chemistry>Materials we Use>Toothpaste
Which of the following is not an example of a bio-mass energy source?
EASY
Science>Chemistry>Materials we Use>Toothpaste
 State two ways to prevent the rusting of iron.
EASY
Science>Chemistry>Materials we Use>Toothpaste

Write names of any two energies produced in ocean.

MEDIUM
Science>Chemistry>Materials we Use>Toothpaste

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
Science>Chemistry>Materials we Use>Toothpaste
Write the name of two elements used as nuclear energy.
EASY
Science>Chemistry>Materials we Use>Toothpaste
Which one of the following is an example of Biomass energy source.
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
Write any four differences between nuclear fusion and nuclear fission.
EASY
Science>Chemistry>Materials we Use>Toothpaste
Nowadays bio-diesel is used in transportation vehicles as an alternate to diesel. Write two advantages of this measure.
EASY
Science>Chemistry>Materials we Use>Toothpaste

Write down the two benefits of use of solar energy.

MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
How is paper manufactured? Write in your own words.
MEDIUM
Science>Chemistry>Materials we Use>Toothpaste
Find things in your classroom or home made of paper.