10th standard science MCQ with answer


1. What is the SI unit of temperature?

   a) Kelvin

   b) Celsius

   c) Fahrenheit

   d) Newton

   Answer: a) Kelvin


2. Which of the following is a type of simple machine?

   a) Lever

   b) Battery

   c) Magnet

   d) Wire

   Answer: a) Lever


3. What is the chemical symbol for sodium?

   a) So

   b) Na

   c) Sa

   d) No

   Answer: b) Na


4. What is the main function of the ribosomes in a cell?

   a) Energy production

   b) Protein synthesis

   c) Waste elimination

   d) Cell division

   Answer: b) Protein synthesis


5. What is the speed of light in a vacuum?

   a) 300,000 km/s

   b) 150,000 km/s

   c) 100,000 km/s

   d) 200,000 km/s

   Answer: a) 300,000 km/s


6. Which


 6. Which of the following is a renewable source of energy?

   a) Coal

   b) Natural gas

   c) Solar power

   d) Petroleum

   Answer: c) Solar power


7. What is the process by which plants make their own food called?

   a) Respiration

   b) Photosynthesis

   c) Fermentation

   d) Decomposition

   Answer: b) Photosynthesis


8. What is the chemical formula for table salt?

   a) H2O

   b) CO2

   c) NaCl

   d) HCl

   Answer: c) NaCl


9. Which of the following is NOT a type of electromagnetic radiation?

   a) X-rays

   b) Sound waves

   c) Ultraviolet rays

   d) Gamma rays

   Answer: b) Sound waves


10. What is the main component of the Earth's atmosphere?

    a) Oxygen

    b) Nitrogen

    c) Carbon dioxide

    d) Hydrogen

    Answer: b) Nitrogen


11. What is the chemical symbol for iron?

    a) Ir

    b) Fe

    c) Io

    d) In

    Answer: b) Fe


12. Which of the following is a greenhouse gas?

    a) Oxygen

    b) Nitrogen

    c) Carbon dioxide

    d) Helium

    Answer: c) Carbon dioxide


13. What is the hardest naturally occurring substance on Earth?

    a) Diamond

    b) Graphite

    c) Quartz

    d) Topaz

    Answer: a) Diamond


14. Which of the following is a type of renewable energy derived from organic matter?

    a) Nuclear energy

    b) Geothermal energy

    c) Biomass energy

    d) Fossil fuel energy

    Answer: c) Biomass energy


15. What is the process of converting water vapor into liquid water called?

    a) Condensation

    b) Evaporation

    c) Sublimation

    d) Precipitation

    Answer: a) Condensation

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