Students in CBSE Class 10 need to have a firm grasp of the science curriculum as the school year goes on. An essential instrument for assessing a candidate’s knowledge and readiness before the final board exams is the pre-board exam. We have put together a list of example questions for the Science Pre-Board exam for CBSE Class 10 in 2024 to aid students in their preparation. These questions cover a wide range of subjects from the CBSE Science syllabus and are designed to evaluate students’ conceptual knowledge and application.

Examples of Questions

Section-A: Objective-Type Questions

1. Which of the following is a non-metal that remains solid at room temperature?
a) Gold
b) Mercury
c) Sulphur
d) Graphite

2. The atomic number of an element is determined by the number of:
a) Protons in an atom
b) Electrons in an atom
c) Neutrons in an atom
d) None of the above

3. Which of the following statements about the process of photosynthesis is true?
a) It takes place only in heterotrophs.
b) It occurs only during the night.
c) It produces glucose and oxygen.
d) It releases carbon dioxide and water.

4. Which of the following is the smallest unit of life?
a) Cell
b) Tissue
c) Organ
d) Organism

5. A convex lens can be used to correct:
a) Myopia
b) Hypermetropia
c) Cataract
d) Astigmatism

6. Which of the following statements about the greenhouse effect is true?
a) It helps to maintain a constant temperature on Earth.
b) It is caused by the depletion of ozone layer.
c) It leads to a decrease in global warming.
d) It has no effect on climate change.

7. What happens when a substance undergoes a chemical change?
a) Its physical properties remain unchanged.
b) It can be easily reversed.
c) New substances are formed.
d) It does not involve the breaking or forming of bonds.

8. Which of the following is a poor conductor of electricity?
a) Copper
b) Graphite
c) Silver
d) Aluminum

9. The process by which green plants make their own food is called:
a) Respiration
b) Transpiration
c) Photosynthesis
d) Excretion

10. Which of the following is a characteristic of a chemical change?
a) Change in state of matter
b) Change in color
c) Change in temperature
d) All of the above

Section-B: Descriptive Type Questions

11. Define respiration. Explain the process of aerobic respiration.

12. Give reasons for the following observations:
a) Water droplets are formed on the outer surface of a glass containing ice-cold water.
b) The leaves of a plant wilt when watered with saltwater.

13. Explain why the sky appears blue during the daytime.

14. Differentiate between metals and non-metals based on their physical and chemical properties.

15. List the differences between a reflection and a refraction of light. Give suitable examples to support your answer.

Section-C: Practical-Based Questions

16. Using a ray diagram, explain how a concave mirror can produce a magnified, erect, and virtual image.

17. Using a simple experiment, show how a solution