CBSE 10 Science Question Paper-2020 Set-3 by Pavan | Practice Test to Test Your Knowledge
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  2. Practice Tests
  3. CBSE 10 Science Question Paper-2020 Set-3
CBSE 10 Science Question Paper-2020 Set-3

CBSE 10 Science Question Paper-2020 Set-3

This mock test includes actual CBSE Class 10 Science board exam questions from the year 2020 Set 3 , helping students understand exam trends and practice real paper formats.

2025-07-28
Pavan Pavan
CBSE Class 10 Science 2020 Grade 10

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

Which oils should be chosen for cooking to remain healthy?

A
Olive oil
B
Vegetable oil
C
Coconut oil
D
Butter

Define the term induced electric current.

A
Current produced by a moving magnetic field.
B
Current produced by chemical reactions.
C
Current produced by battery.
D
Current produced by light energy.

State Mendeleev's Periodic Law.

A
The properties of elements are a periodic function of their atomic number.
B
The properties of elements are a periodic function of their atomic mass.
C
The properties of elements depend on the mass of protons.
D
The properties of elements are periodic based on electron configuration.

Why did Mendeleev leave some gaps in the Periodic table?

A
Because he anticipated the discovery of elements with similar properties.
B
Because he couldn't categorize certain elements.
C
Because he found errors in the atomic masses.
D
Because he wanted to add more rows.

Isotopes are:

A
Atoms of an element with similar chemical properties but different atomic masses.
B
Atoms of different elements with similar chemical properties but different atomic masses.
C
Atoms of an element with different chemical properties but same atomic masses.
D
Atoms of different elements with different chemical properties but same atomic masses.

State two methods of effective plastic waste collection in your school.

A
Segregation at source and centralized waste collection bins.
B
Use of eco-friendly bags and incineration.
C
Recycling and burning plastics.
D
Donation of plastic items and using disposable plastics.

Name two uses of single-use plastic in daily life.

A
Plastic straws and plastic bottles.
B
Plastic containers and biodegradable plastics.
C
Plastic bags and aluminum foil.
D
Plastic toys and glass bottles.

If we discontinue the use of plastic, how can an environment-friendly substitute be provided?

A
Using biodegradable materials like paper and jute.
B
Using metal for packaging.
C
Recycling the existing plastics.
D
Using synthetic polymers.

Do you think microbes will work similarly in landfill sites as they work in the laboratory? Justify your answer.

A
Yes, because microbes naturally break down organic waste.
B
No, because landfill microbes cannot survive in harsh conditions.
C
Yes, because all microbes are uniform in nature.
D
No, because microbes are only effective in controlled environments.

Which of the following is a correct statement about the human circulatory system?

A
Blood transports only oxygen and not carbon dioxide.
B
Human heart has five chambers.
C
Valves ensure that the blood does not flow backwards.
D
Both oxygen-rich and oxygen-poor blood flow in the same direction.

What is the main function of chlorophyll in plants?

A
To absorb sunlight for photosynthesis.
B
To make the plant green.
C
To transport water in the plant.
D
To store food in the plant.

Which of the following is true about chemical reactions?

A
The number of atoms remains constant during the reaction.
B
New atoms are created during the reaction.
C
Energy is neither absorbed nor released.
D
Atoms are destroyed during the reaction.

What is the process of respiration in animals?

A
The process of producing food using sunlight.
B
The breakdown of food to release energy.
C
The movement of air in and out of the lungs.
D
The absorption of nutrients into the body.

Which of the following materials is used for making a magnet?

A
Iron
B
Copper
C
Aluminum
D
Plastic

What is the primary source of energy for the Earth?

A
The Moon
B
The Sun
C
The Earth itself
D
The Ocean

Which of the following is an example of a non-renewable resource?

A
Wind
B
Solar energy
C
Natural gas
D
Hydropower

Which gas is most commonly associated with global warming?

A
Oxygen
B
Nitrogen
C
Carbon dioxide
D
Helium

Which of the following elements is the most abundant in the Earth's crust?

A
Oxygen
B
Silicon
C
Aluminum
D
Iron

What is the main purpose of the ozone layer?

A
To absorb ultraviolet radiation
B
To produce oxygen
C
To trap greenhouse gases
D
To regulate the Earth's temperature

Which of the following is a property of acids?

A
They have a bitter taste.
B
They turn blue litmus paper red.
C
They feel slippery.
D
They have a soapy feel.

Which of the following best describes a chemical change?

A
A change in the state of matter.
B
A change in the appearance of a substance.
C
A reaction in which new substances are formed.
D
A physical change that does not alter the substance.

What is the primary function of the root system in plants?

A
To anchor the plant and absorb water.
B
To produce food for the plant.
C
To protect the plant from herbivores.
D
To allow plant growth in the soil.

Which type of bond is formed when two atoms share electrons?

A
Ionic bond
B
Covalent bond
C
Hydrogen bond
D
Metallic bond

What is the most abundant gas in the Earth's atmosphere?

A
Oxygen
B
Carbon dioxide
C
Nitrogen
D
Hydrogen

What is the significance of the law of conservation of mass?

A
Mass is always conserved during a chemical reaction.
B
Matter can be created and destroyed in a reaction.
C
Mass can be converted into energy.
D
Mass of reactants is greater than products.

Which element is known as the 'building block of life'?

A
Oxygen
B
Carbon
C
Hydrogen
D
Nitrogen

What happens to water when it is heated?

A
It freezes.
B
It evaporates.
C
It solidifies.
D
It condenses.

Which of the following is not a renewable energy source?

A
Wind
B
Solar
C
Coal
D
Hydropower

What is the main purpose of chloroplasts in plant cells?

A
To carry out photosynthesis
B
To absorb nutrients
C
To store food
D
To assist in cell division

Which type of cell division is responsible for growth and repair in multicellular organisms?

A
Meiosis
B
Mitosis
C
Binary fission
D
Cloning