10TH CBSE SCIENCE PREVIOUS YEAR MCQS QUIZ WITH ANSWERS

CBSE Class 10 Science

Previous Year Pattern MCQ Test

25 Questions | 25 Marks

Instructions

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• Each question carries 1 mark.
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CHEMISTRY

1. Which gas is evolved when a metal reacts with a dilute acid?

A. Oxygen B. Hydrogen C. Nitrogen D. Carbon dioxide

CHEMISTRY

2. Which of the following is an oxidation reaction?

A. Addition of oxygen to a substance B. Addition of hydrogen to a substance C. Removal of oxygen from a substance D. Removal of oxygen and addition of hydrogen

CHEMISTRY

3. Which substance turns blue litmus paper red?

A. Base B. Acid C. Salt only D. Neutral solution

CHEMISTRY

4. What is the pH of a neutral solution at 25°C?

A. 0 B. 5 C. 7 D. 14

CHEMISTRY

5. Which compound is commonly known as baking soda?

A. Sodium carbonate B. Sodium hydrogen carbonate C. Calcium carbonate D. Sodium chloride

CHEMISTRY

6. Which metal is generally stored under kerosene?

A. Iron B. Copper C. Sodium D. Silver

CHEMISTRY

7. Which of the following is a property of ionic compounds?

A. Low melting points B. They conduct electricity in molten state C. They are always gases D. They are insoluble in water in all cases

CHEMISTRY

8. Which functional group is present in ethanol?

A. –COOH B. –CHO C. –OH D. –CO–

CHEMISTRY

9. Soap molecules have:

A. Only a hydrophilic end B. Only a hydrophobic end C. A hydrophilic end and a hydrophobic end D. Neither hydrophilic nor hydrophobic end

BIOLOGY

10. Which part of the neuron receives information from the surroundings?

A. Axon B. Dendrite C. Cell body only D. Synapse

BIOLOGY

11. Which hormone is responsible for regulating blood sugar levels?

A. Thyroxine B. Insulin C. Adrenaline D. Growth hormone

BIOLOGY

12. Which part of the brain controls voluntary actions?

A. Cerebrum B. Medulla C. Spinal cord D. Cerebellum only

BIOLOGY

13. The process by which green plants prepare food is called:

A. Respiration B. Photosynthesis C. Transpiration D. Digestion

BIOLOGY

14. Which component of blood transports oxygen?

A. Plasma B. Platelets C. Red blood cells D. White blood cells

BIOLOGY

15. Which organ removes nitrogenous wastes from the blood?

A. Heart B. Kidney C. Lungs D. Stomach

BIOLOGY

16. Which method of reproduction involves only one parent?

A. Sexual reproduction B. Asexual reproduction C. Fertilisation D. Cross-pollination

BIOLOGY

17. In human beings, fertilisation normally occurs in the:

A. Uterus B. Ovary C. Fallopian tube D. Cervix

BIOLOGY

18. Which Mendelian trait is dominant in pea plants?

A. Dwarfness B. Wrinkled seeds C. Tallness D. Green seed colour

BIOLOGY

19. The sex of a child is determined by:

A. Mother only B. Father only C. Both parents equally through the same chromosome D. Environment only

BIOLOGY

20. Which gas is mainly responsible for the greenhouse effect?

A. Oxygen B. Carbon dioxide C. Nitrogen D. Hydrogen

PHYSICS

21. What is the SI unit of electric current?

A. Volt B. Ohm C. Ampere D. Watt

PHYSICS

22. According to Ohm's law, the potential difference across a conductor is:

A. V = IR B. V = I/R C. V = R/I D. V = I + R

PHYSICS

23. The resistance of a conductor depends on:

A. Its length B. Its area of cross-section C. Nature of material All of the above

PHYSICS

24. Which lens is used to correct myopia?

A. Convex lens B. Concave lens C. Cylindrical lens only D. Plane glass

PHYSICS

25. The direction of magnetic field around a straight current-carrying conductor can be determined by:

A. Fleming's left-hand rule B. Right-hand thumb rule C. Fleming's right-hand rule D. Ohm's law

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