NCERT Class 9 Science Objective Question Bank

Class: 9 | Subject: Science | Section: Exam Oriented | Topic: NCERT Class 9 Science Objective Question Bank
Based on: CBSE Board Examination Pattern & NCERT Syllabus

1. Matter is anything that has:

A. Mass only
B. Volume only
C. Mass and occupies space
D. Shape only

Answer: C

Explanation: Matter is defined as anything that has mass and occupies space. All physical substances around us are matter.

2. Diffusion is fastest in:

A. Solids
B. Liquids
C. Gases
D. Plasma membrane

Answer: C

Explanation: Gas particles have maximum kinetic energy and intermolecular space, so diffusion is fastest.

3. Atomic number represents:

A. Neutrons
B. Electrons + Neutrons
C. Protons
D. Nucleons

Answer: C

Explanation: Atomic number equals number of protons. It determines the identity of an element.

4. Velocity is speed with:

A. Direction
B. Time
C. Distance
D. Acceleration

Answer: A

Explanation: Velocity is a vector quantity — speed plus direction.

5. Inertia depends upon:

A. Speed
B. Mass
C. Shape
D. Volume

Answer: B

Explanation: Greater the mass, greater the inertia — resistance to change in motion.

6. Unit of acceleration is:

A. m/s
B. m/s²
C. km/h
D. N

Answer: B

Explanation: Acceleration = change in velocity per second → m/s².

7. Cell wall is present in:

A. Animal cells
B. Plant cells
C. Both
D. None

Answer: B

Explanation: Plant cells have a rigid cellulose cell wall for protection and shape.

8. Plastids containing chlorophyll are:

A. Leucoplasts
B. Chromoplasts
C. Chloroplasts
D. Amyloplasts

Answer: C

Explanation: Chloroplasts perform photosynthesis using chlorophyll pigment.

9. Tissue responsible for transport in plants:

A. Meristem
B. Xylem & Phloem
C. Parenchyma
D. Collenchyma

Answer: B

Explanation: Xylem transports water; phloem transports food.

10. SI unit of pressure:

A. Newton
B. Pascal
C. Joule
D. Watt

Answer: B

Explanation: Pressure = Force/Area. SI unit is Pascal.

11. Buoyant force is exerted by:

A. Solids
B. Liquids
C. Gases
D. Fluids

Answer: D

Explanation: Both liquids and gases (fluids) exert buoyant force.

12. Sound travels fastest in:

A. Air
B. Water
C. Steel
D. Vacuum

Answer: C

Explanation: Sound travels fastest in solids due to closely packed particles.

13. Ozone layer protects from:

A. Infrared rays
B. Visible light
C. UV rays
D. X-rays

Answer: C

Explanation: Ozone absorbs harmful ultraviolet radiation.

14. Energy stored in food is:

A. Kinetic
B. Chemical
C. Heat
D. Mechanical

Answer: B

Explanation: Food stores chemical energy released during respiration.

15. Universal solvent is:

A. Alcohol
B. Acid
C. Water
D. Ether

Answer: C

Explanation: Water dissolves most substances, hence called universal solvent.

16. Main source of energy on Earth:

A. Moon
B. Sun
C. Wind
D. Coal

Answer: B

Explanation: Sun drives climate, photosynthesis, and energy cycles.

17. Instrument to measure temperature:

A. Barometer
B. Thermometer
C. Ammeter
D. Lactometer

Answer: B

Explanation: Thermometer measures temperature.

18. Non-contact force:

A. Friction
B. Muscular
C. Gravitational
D. Mechanical

Answer: C

Explanation: Gravitational force acts without physical contact.

19. Largest cell organelle:

A. Nucleus
B. Vacuole
C. Mitochondria
D. Ribosome

Answer: B

Explanation: Plant cells have large central vacuole for storage.

20. Conversion of solid to gas directly:

A. Melting
B. Evaporation
C. Sublimation
D. Condensation

Answer: C

Explanation: Sublimation is direct change from solid to vapour (e.g., camphor).

NCERT Class 9 Science Objective Question Bank

NCERT Class 9 Science Objective Question Bank

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