Class 9 Science Mock Test MCQs

Class: 9 | Subject: Science | Section: Exam Oriented | Topic: Class 9 Science Mock Test MCQs
Based on: CBSE Board Examination Pattern & NCERT Syllabus

1. Which law states that every action has an equal and opposite reaction?

A. First law
B. Second law
C. Third law
D. Law of gravitation

Answer: C

Explanation: Newton’s Third Law explains action–reaction force pairs acting on different bodies.

2. The density of a substance is mass per:

A. Area
B. Volume
C. Length
D. Weight

Answer: B

Explanation: Density = Mass ÷ Volume. It indicates how closely particles are packed.

3. Endoplasmic reticulum functions in:

A. Respiration
B. Transport of materials
C. Digestion
D. Photosynthesis

Answer: B

Explanation: ER forms channels for transport of proteins and lipids inside cells.

4. The slope of distance–time graph in uniform motion is:

A. Acceleration
B. Velocity
C. Speed
D. Force

Answer: C

Explanation: Slope = Distance/Time which equals speed in uniform motion.

5. Which tissue stores fat in animals?

A. Areolar
B. Adipose
C. Muscular
D. Nervous

Answer: B

Explanation: Adipose tissue stores fat and insulates the body.

6. The process of cell division for growth is:

A. Meiosis
B. Mitosis
C. Budding
D. Fusion

Answer: B

Explanation: Mitosis produces identical daughter cells for growth and repair.

7. SI unit of momentum:

A. kg m/s
B. N/m
C. Joule
D. Watt

Answer: A

Explanation: Momentum = Mass × Velocity.

8. Which layer of atmosphere contains ozone?

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere

Answer: B

Explanation: Ozone layer lies in the stratosphere.

9. Work done is zero when force is:

A. Parallel
B. Perpendicular
C. Equal
D. Large

Answer: B

Explanation: If displacement is perpendicular, cos90° = 0 → Work = 0.

10. Photosynthesis occurs in:

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

Answer: B

Explanation: Chloroplast contains chlorophyll for photosynthesis.

11. Unit of power:

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

Answer: B

Explanation: Power = Work/Time. SI unit is Watt.

12. Bohr model explains structure of:

A. Nucleus
B. Atom
C. Molecule
D. Electron

Answer: B

Explanation: Bohr described electrons revolving in fixed orbits.

13. Velocity–time graph slope gives:

A. Distance
B. Speed
C. Acceleration
D. Force

Answer: C

Explanation: Slope = change in velocity/time = acceleration.

14. Tissue connecting bone to bone:

A. Tendon
B. Ligament
C. Cartilage
D. Muscle

Answer: B

Explanation: Ligaments join bones at joints.

15. Change of gas to liquid:

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

Answer: C

Explanation: Cooling converts vapour into liquid.

16. Instrument measuring electric current:

A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Galvanometer

Answer: B

Explanation: Ammeter measures current in amperes.

17. Force of attraction between masses:

A. Magnetic
B. Electrostatic
C. Gravitational
D. Frictional

Answer: C

Explanation: Universal gravitation acts between all masses.

18. SI unit of energy:

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

Answer: B

Explanation: Energy and work share same SI unit → Joule.

19. Plant tissue for growth:

A. Permanent
B. Meristematic
C. Vascular
D. Epidermal

Answer: B

Explanation: Meristematic tissue divides continuously for growth.

20. Pressure increases when area:

A. Increases
B. Decreases
C. Constant
D. Doubles

Answer: B

Explanation: Pressure = Force/Area → Smaller area gives greater pressure.

Class 9 Science Mock Test MCQs

Class 9 Science Mock Test MCQs

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