Class 10 Science Practice Questions

18 free practice MCQs for Class 10 Science, following the school syllabus — playable as an adaptive quiz in English, Hindi, Tamil, Telugu, Bengali and 8 more Indian languages. No sign-up, no ads.

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Sample questions with answers

Q1. What type of reaction is: Zn + CuSO₄ → ZnSO₄ + Cu? 🔬

  1. Double displacement reaction
  2. Displacement reaction
  3. Combination reaction
  4. Decomposition reaction
Show answer

B. Displacement reaction

Q2. The SI unit of electric current is: 🔬

  1. Ohm
  2. Watt
  3. Volt
  4. Ampere
Show answer

D. Ampere

Q3. The focal length of a concave mirror is 10 cm. Its radius of curvature is: 🔬

  1. 10 cm
  2. 5 cm
  3. 20 cm
  4. 40 cm
Show answer

C. 20 cm

Q4. Which gas is produced when dilute HCl reacts with zinc? 🔬

  1. Oxygen
  2. Chlorine
  3. Carbon dioxide
  4. Hydrogen
Show answer

D. Hydrogen

Q5. According to Ohm's law, V = IR. If V is doubled and R remains the same, then I: 🔬

  1. Remains the same
  2. Doubles
  3. Quadruples
  4. Halves
Show answer

B. Doubles

Q6. The process by which green plants make their own food is called: 🔬

  1. Photosynthesis
  2. Respiration
  3. Transpiration
  4. Digestion
Show answer

A. Photosynthesis

Q7. Which of the following is a non-renewable source of energy? 🔬

  1. Coal
  2. Solar energy
  3. Wind energy
  4. Hydropower
Show answer

A. Coal

Q8. The pH of a neutral solution is: 🔬

  1. 0
  2. Below 7
  3. Above 7
  4. 7
Show answer

D. 7

Q9. The refraction of light occurs because: 🔬

  1. Light is absorbed by the medium
  2. Light changes colour when entering a new medium
  3. Light bounces back from the surface
  4. Light changes speed when it passes from one medium to another
Show answer

D. Light changes speed when it passes from one medium to another

Q10. Mendel's law of segregation states that: 🔬

  1. Alleles separate during gamete formation
  2. All offspring are identical to the parent
  3. Genes always blend together
  4. Dominant traits always appear
Show answer

A. Alleles separate during gamete formation

Q11. Who is known as the Father of Genetics?

  1. Gregor Mendel
  2. Gautama Buddha
  3. Ashoka
  4. Mahatma Gandhi
Show answer

A. Gregor Mendel

Q12. What is the chemical formula of water?

  1. H₂O₂
  2. H₂O
  3. HO
  4. H₃O
Show answer

B. H₂O

Q13. What is the chemical formula of carbon dioxide?

  1. CO
  2. CO₃
  3. CO₂
  4. C₂O
Show answer

C. CO₂

Q14. What is the chemical symbol of this element? Sodium (common salt NaCl)

  1. Ne
  2. Ni
  3. No
  4. Na
Show answer

D. Na

Q15. What is the SI unit of electric current?

  1. Ampere
  2. Volt
  3. Ohm
  4. Watt
Show answer

A. Ampere

Q16. What is the SI unit of energy?

  1. Newton
  2. Joule
  3. Watt
  4. Pascal
Show answer

B. Joule

Q17. What is the SI unit of force?

  1. Joule
  2. Pascal
  3. Newton
  4. Ampere
Show answer

C. Newton

Q18. Which organelle is called the powerhouse of the cell?

  1. Nucleus
  2. Ribosome
  3. Vacuole
  4. Mitochondria
Show answer

D. Mitochondria

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