SET - 1 SCIENCE MCQs 30 (MCQS for Class 10 Science subject based on NCERT)

Class 10 Science MCQs

Note: Answers are in page 4

1. Which of the following is a balanced chemical equation?

a) H₂ + O₂ → H₂O

b) 2H₂ + O₂ → 2H₂O

c) H₂ + 2O₂ → H₂O₂

d) 2H₂ + 2O₂ → 2H₂O

2. The pH of a neutral solution at 25°C is:

a) 0

b) 7

c) 14

d) 1

3. Which of the following metals does not react with cold water?

a) Sodium

b) Calcium

c) Magnesium

d) Potassium

4. The functional group present in ethanol is:

a) –CHO

b) –COOH

c) –OH

d) –CO

5. Which of the following is not a life process?

a) Respiration

b) Reproduction

c) Excretion

d) Photosynthesis

6. In humans, the control and coordination are provided by:

a) Respiratory system

b) Nervous and endocrine systems

c) Circulatory system

d) Excretory system

7. Which part of the human brain is responsible for maintaining posture and balance?

a) Cerebrum

b) Cerebellum

c) Medulla oblongata

d) Hypothalamus

8. The process of transfer of pollen grains from the anther to the stigma of the same flower is called:

a) Cross-pollination

b) Self-pollination

c) Fertilization

d) Germination

9. Which of the following is a renewable source of energy?

a) Coal

b) Petroleum

c) Natural gas

d) Solar energy

10. The image formed by a convex mirror is always:

a) Real and inverted

b) Virtual and erect

c) Real and erect

d) Virtual and inverted

11. The unit of electric current is:

a) Volt

b) Ohm

c) Ampere

d) Watt

12. Which of the following is a good conductor of electricity?

a) Rubber

b) Glass

c) Copper

d) Wood

13. The phenomenon of splitting of white light into its constituent colors is called:

a) Reflection

b) Refraction

c) Dispersion

d) Diffraction

14. Which gas is the major contributor to the greenhouse effect?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Hydrogen

15. The atomic number of an element represents:

a) Number of neutrons

b) Number of protons

c) Number of electrons

d) Sum of protons and neutrons

16. Which of the following is a non-biodegradable substance?

a) Paper

b) Cotton cloth

c) Plastic

d) Wool

17. The SI unit of force is:

a) Joule

b) Newton

c) Pascal

d) Watt

18. Which of the following is an exothermic reaction?

a) Melting of ice

b) Evaporation of water

c) Combustion of coal

d) Electrolysis of water

19. The process of conversion of sugar into alcohol is called:

a) Saponification

b) Fermentation

c) Esterification

d) Hydrogenation

20. Which of the following is a plant hormone?

a) Insulin

b) Thyroxine

c) Auxin

d) Adrenaline

21. What is the main component of biogas?

a) Carbon dioxide

b) Methane

c) Hydrogen

d) Nitrogen

22. The blood vessel that carries oxygenated blood from the lungs to the heart is:

a) Pulmonary vein

b) Pulmonary artery

c) Aorta

d) Superior vena cava

23. Which of the following is a chemical change?

a) Melting of ice

b) Boiling of water

c) Burning of wood

d) Breaking of glass

24. The law of conservation of energy states that:

a) Energy can be created but not destroyed

b) Energy can be destroyed but not created

c) Energy can neither be created nor destroyed

d) Energy is unlimited

25. In a series circuit, the total resistance is:

a) Equal to the sum of individual resistances

b) Less than the smallest resistance

c) Equal to the largest resistance

d) Equal to the reciprocal of individual resistances

26. The power of a lens is measured in:

a) Diopters

b) Hertz

c) Joules

d) Watts

27. What is the SI unit of electric potential?

a) Ampere

b) Volt

c) Ohm

d) Joule

28. Which of the following acids is present in lemon?

a) Acetic acid

b) Citric acid

c) Hydrochloric acid

d) Sulfuric acid

29. The primary function of leaves is:

a) Absorption

b) Photosynthesis

c) Reproduction

d) Protection

30. Which of the following is a property of metals?

a) Brittle

b) Non-conductive

c) Ductile

d) Transparent

Class 10 Science MCQs

1. Which of the following is a balanced chemical equation?

a) H₂ + O₂ → H₂O

b) 2H₂ + O₂ → 2H₂O

c) H₂ + 2O₂ → H₂O₂

d) 2H₂ + 2O₂ → 2H₂O

2. The pH of a neutral solution at 25°C is:

a) 0

b) 7

c) 14

d) 1

3. Which of the following metals does not react with cold water?

a) Sodium

b) Calcium

c) Magnesium

d) Potassium

4. The functional group present in ethanol is:

a) –CHO

b) –COOH

c) –OH

d) –CO

5. Which of the following is not a life process?

a) Respiration

b) Reproduction

c) Excretion

d) Photosynthesis

6. In humans, the control and coordination are provided by:

a) Respiratory system

b) Nervous and endocrine systems

c) Circulatory system

d) Excretory system

7. Which part of the human brain is responsible for maintaining posture and balance?

a) Cerebrum

b) Cerebellum

c) Medulla oblongata

d) Hypothalamus

8. The process of transfer of pollen grains from the anther to the stigma of the same flower is called:

a) Cross-pollination

b) Self-pollination

c) Fertilization

d) Germination

9. Which of the following is a renewable source of energy?

a) Coal

b) Petroleum

c) Natural gas

d) Solar energy

10. The image formed by a convex mirror is always:

a) Real and inverted

b) Virtual and erect

c) Real and erect

d) Virtual and inverted

11. The unit of electric current is:

a) Volt

b) Ohm

c) Ampere

d) Watt

12. Which of the following is a good conductor of electricity?

a) Rubber

b) Glass

c) Copper

d) Wood

13. The phenomenon of splitting of white light into its constituent colors is called:

a) Reflection

b) Refraction

c) Dispersion

d) Diffraction

14. Which gas is the major contributor to the greenhouse effect?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Hydrogen

15. The atomic number of an element represents:

a) Number of neutrons

b) Number of protons

c) Number of electrons

d) Sum of protons and neutrons

16. The universal solvent is:

a) Alcohol

b) Water

c) Ether

d) Benzene

17. The phenomenon responsible for the blue color of the sky is:

a) Dispersion

b) Scattering of light

c) Diffraction

d) Interference

18. The pH of a basic solution is:

a) Less than 7

b) Equal to 7

c) Greater than 7

d) None of these

19. Which of the following is an excretory product of plants?

a) Oxygen

b) Carbon dioxide

c) Tannins

d) All of the above

20. In a concave mirror, the image formed when the object is placed at the center of curvature is:

a) Real, inverted, and of the same size

b) Virtual, upright, and diminished

c) Real, inverted, and enlarged

d) Virtual, upright, and of the same size

21. What is the main component of biogas?

a) Carbon dioxide

b) Methane

c) Hydrogen

d) Nitrogen

22. The blood vessel that carries oxygenated blood from the lungs to the heart is:

a) Pulmonary vein

b) Pulmonary artery

c) Aorta

d) Superior vena cava

23. Which of the following is a chemical change?

a) Melting of ice

b) Boiling of water

c) Burning of wood

d) Breaking of glass

24. The law of conservation of energy states that:

a) Energy can be created but not destroyed

b) Energy can be destroyed but not created

c) Energy can neither be created nor destroyed

d) Energy is unlimited

25. In a series circuit, the total resistance is:

a) Equal to the sum of individual resistances

b) Less than the smallest resistance

c) Equal to the largest resistance

d) Equal to the reciprocal of individual resistances

26. The power of a lens is measured in:

a) Diopters

b) Hertz

c) Joules

d) Watts

27. What is the SI unit of electric potential?

a) Ampere

b) Volt

c) Ohm

d) Joule

28. Which of the following acids is present in lemon?

a) Acetic acid

b) Citric acid

c) Hydrochloric acid

d) Sulfuric acid

29. The primary function of leaves is:

a) Absorption

b) Photosynthesis

c) Reproduction

d) Protection

30. Which of the following is a property of metals?

a) Brittle

b) Non-conductive

c) Ductile

d) Transparent

1 2 3 4