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

A. Polarization

B. Refraction

C. Dispersion

D. Diffraction

2 / 30

2. 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

3 / 30

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

A. Pulmonary artery

B. Aorta

C. Vena cava

D. Pulmonary vein

4 / 30

4. What is the SI unit of electric flux?

A. Coulomb

B. Farad

C. Weber

D. Volt-meter

5 / 30

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

A. 0

B. -2

C. +1

D. -1

6 / 30

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

A. Filtration of blood and urine production

B. Regulation of blood sugar levels

C. Regulation of body temperature

D. Production of red blood cells

7 / 30

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

A. Cell wall

B. Circular DNA

C. Membrane-bound organelles

D. Ribosomes

8 / 30

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

A. Ampere-turn

B. Gauss

C. Tesla

D. Weber

9 / 30

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

A. Protein synthesis

B. Lipid synthesis

C. ATP production

D. DNA replication

10 / 30

10. In a redox reaction, oxidation is the:

A. Gain of protons

B. Loss of protons

C. Gain of electrons

D. Loss of electrons

11 / 30

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

A. Copper

B. Zinc

C. Calcium

D. Iron

12 / 30

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

A. Protein modification and packaging

B. Cellular respiration

C. Protein synthesis

D. Lipid storage

13 / 30

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

A. Combustion of methane

B. Neutralization of an acid with a base

C. Freezing of water

D. Photosynthesis

14 / 30

14. Which of the following compounds exhibits hydrogen bonding?

A.

Methane (CH4)

B.

Ethanol (C₂H₅OH)

C.

Ethane (C₂H₆)

D.

Propane (C3H8)

15 / 30

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

A. Adrenaline

B. Estrogen

C. Testosterone

D. Insulin

16 / 30

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

A. Burning wood

B. Photosynthesis

C. Dissolving salt in water

D. Melting ice

17 / 30

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

A. Decreases with time

B. Is unpredictable

C. Remains constant

D. Increases with time

18 / 30

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

A. Atomic number

B. Electron configuration

C. Mass number

D. Ionization energy

19 / 30

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

A. 9

B. 7

C. 3

D. 5

20 / 30

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

A.

Bitter taste

B.

Turns litmus paper blue

C.

Releases hydrogen ions (H⁺) in solution

D.

Reacts with metals to form salts

21 / 30

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

A. 6

B. 8

C. 32

D. 18

22 / 30

22. What is the chemical formula for sulfuric acid?

A.

H₂SO₄

B.

NaOH

C.

HCl

D.

HNO₃

23 / 30

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

A. Metallic bond

B. Covalent bond

C. Hydrogen bond

D. Ionic bond

24 / 30

24. What is the function of chlorophyll in photosynthesis?

A. Release oxygen

B. Absorb sunlight

C. Break down glucose

D. Produce ATP

25 / 30

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

A. Gravitational force

B. Strong nuclear force

C. Chemical force

D. Electromagnetic force

26 / 30

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

A. Recognition and signaling

B. Protein synthesis

C. Cell adhesion

D. Regulation of cellular transport

27 / 30

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

A. White blood cells

B. Lymph nodes

C. Platelets

D. Antibodies

28 / 30

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

A. Fission

B. Radioactive decay

C. Fusion

D. Ionization

29 / 30

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

A. Length increases

B. Time slows down

C. Mass decreases

D. Density increases

30 / 30

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

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

B. Electrons jump from one energy level to another.

C. Light bends when passing through a medium.

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

Your score is

The average score is 32%

0%

Quick Link

Our Services

Listed Institution