Mock Test – CBSE Class 12 Science (Physics, Chemistry and Biology) - CollegeXpad Navigating your Educational Journey

"Gear up for a thrilling challenge - the mock test starts now! 🚀🧠

"Congratulations! You've reached the end of the test– your intellect shines bright. Well done! 🌟

Mock Test For CBSE Class 12 Students (Science)

Here's a Mock Test for Class 12 Students.

NameEmailMobile

1 / 30

1. According to the law of conservation of momentum, in a closed system, the total momentum:

A. Increases with time

B. Is unpredictable

C. Decreases with time

D. Remains constant

2 / 30

2. What is the SI unit of magnetic flux density?

A. Weber

B. Ampere-turn

C. Gauss

D. Tesla

3 / 30

3. Which of the following is NOT a transition metal?

A. Iron

B. Copper

C. Zinc

D. Calcium

4 / 30

4. What is the function of chlorophyll in photosynthesis?

A. Produce ATP

B. Absorb sunlight

C. Release oxygen

D. Break down glucose

5 / 30

5. Which of the following compounds exhibits hydrogen bonding?

A.

Propane (C3H8)

B.

Methane (CH4)

C.

Ethane (C₂H₆)

D.

Ethanol (C₂H₅OH)

6 / 30

6. What is the oxidation state of oxygen in H2O2 (hydrogen peroxide)?

A. +1

B. -2

C. -1

D. 0

7 / 30

7. In humans, which blood vessel carries oxygenated blood away from the heart to the body tissues?

A. Vena cava

B. Pulmonary vein

C. Pulmonary artery

D. Aorta

8 / 30

8. What is the maximum number of electrons that can occupy the ( n = 3 ) energy level in an atom?

A. 18

B. 8

C. 32

D. 6

9 / 30

9. According to the theory of relativity, as an object's velocity approaches the speed of light, its:

A. Mass decreases

B. Time slows down

C. Length increases

D. Density increases

10 / 30

10. The term "isotope" refers to atoms of the same element that have different:

A. Mass number

B. Electron configuration

C. Atomic number

D. Ionization energy

11 / 30

11. Which of the following is NOT a function of the cell membrane?

A. Cell adhesion

B. Protein synthesis

C. Regulation of cellular transport

D. Recognition and signaling

12 / 30

12. What is the SI unit of electric flux?

A. Volt-meter

B. Weber

C. Farad

D. Coulomb

13 / 30

13. Which of the following is NOT a characteristic of prokaryotic cells?

A. Circular DNA

B. Cell wall

C. Membrane-bound organelles

D. Ribosomes

14 / 30

14. Which of the following is a characteristic property of a base?

A.

Releases hydrogen ions (H⁺) in solution

B.

Bitter taste

C.

Reacts with metals to form salts

D.

Turns litmus paper blue

15 / 30

15. Which of the following statements best describes the phenomenon of quantum tunneling?

A. Electrons jump from one energy level to another.

B. Light bends when passing through a medium.

C. Electrons move randomly within an atom's orbitals.

D. Particles penetrate a potential energy barrier without having enough energy to overcome it classically.

16 / 30

16. Which of the following represents the correct relationship between frequency ( $f$ ), wavelength ( $λ$ ), and speed of a wave ( $v$ )?

A. v=f×λ

B. v= f /λ

C. v=f+λ

D. v= λ /f

17 / 30

17. Which phenomenon describes the bending of light when it passes from one medium to another?

A. Polarization

B. Diffraction

C. Refraction

D. Dispersion

18 / 30

18. Which of the following is NOT a fundamental force in nature?

A. Electromagnetic force

B. Strong nuclear force

C. Chemical force

D. Gravitational force

19 / 30

19. In a redox reaction, oxidation is the:

A. Loss of protons

B. Gain of electrons

C. Loss of electrons

D. Gain of protons

20 / 30

20. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-9 M?

A. 9

B. 3

C. 5

D. 7

21 / 30

21. What is the primary function of the kidneys in the human body?

A. Regulation of body temperature

B. Regulation of blood sugar levels

C. Filtration of blood and urine production

D. Production of red blood cells

22 / 30

22. The process by which an unstable atomic nucleus loses energy by emitting radiation is called:

A. Fusion

B. Ionization

C. Fission

D. Radioactive decay

23 / 30

23. Which of the following is an example of an endothermic reaction?

A. Neutralization of an acid with a base

B. Freezing of water

C. Photosynthesis

D. Combustion of methane

24 / 30

24. What is the function of ribosomes in a cell?

A. ATP production

B. DNA replication

C. Protein synthesis

D. Lipid synthesis

25 / 30

25. What is the primary function of the Golgi apparatus?

A. Protein synthesis

B. Protein modification and packaging

C. Lipid storage

D. Cellular respiration

26 / 30

26. Which of the following is NOT a component of the human immune system?

A. White blood cells

B. Antibodies

C. Platelets

D. Lymph nodes

27 / 30

27. What type of bond is formed when electrons are shared between atoms?

A. Metallic bond

B. Hydrogen bond

C. Covalent bond

D. Ionic bond

28 / 30

28. Which of the following is a hormone produced by the pancreas that regulates blood sugar levels?

A. Insulin

B. Adrenaline

C. Estrogen

D. Testosterone

29 / 30

29. What is the chemical formula for sulfuric acid?

A.

NaOH

B.

H₂SO₄

C.

HNO₃

D.

HCl

30 / 30

30. Which of the following is an example of an exothermic reaction?

A. Photosynthesis

B. Dissolving salt in water

C. Melting ice

D. Burning wood

Your score is

The average score is 67%

0%

Quick Link

Our Services

Listed Institution