CBSE Class 10 Science 2024 Exam (02/03/2024) Answer Key OUT! Check Now

The Central Board of Secondary Education (CBSE) has successfully conducted the Class 10 Science Exam for the session 2023-24 on 2nd March 2024. Lakhs of students appeared in the Class 10 Science exam from all over India this year. Now the students are eagerly waiting for the answer key so that they can check their score. Though the CBSE will release the official answer key on its website www.cbse.gov.in, it will take some time. In the meantime, we are providing you with the answer key of the Class 10 Science 2024 Question Paper.

Level of Question: At first glance, the question paper appears to be of moderate level. There is more weightage of competency-based questions and numerical problems.

Class	10
Subject	Science
Exam Date	02/03/2024
Board	CBSE
Question Paper Series	CABD5/5
Code	31/5/2
Set	2
Content-Type	Answer Key

CBSE Class 10 Science Exam 2024 Question Paper and Solutions

Answer Key

1. Option (c)
2. Option (d)
3. Option (a)
4. Option (c)
5. Option (d)
6. Option (a)
7. Option (c)
8. Option (c)
9. Option (b)
10. Option (d)
11. Option (c)
12. Option (c)
13. Option (a)
14. Option (c)
15. Option (b)
16. Option (a)
17. Option (b)
18. Option (a)
19. Option (d)
20. Option (d)

21. a. During muscle cramps, athletes often experience anaerobic respiration. This type of respiration occurs when oxygen supply to muscles is insufficient, leading to the incomplete breakdown of glucose, resulting in the production of lactic acid. Unlike aerobic respiration, anaerobic respiration doesn't require oxygen and is less efficient, leading to the buildup of lactic acid and causing muscle fatigue and cramps.

22. a. -COOH, Carboxylic acid. Name is Ethanoic acid.

b. -CO-, Aldehyde. Name is Methanal.

23. a. copper(II) oxide, Color: Black,

2Cu + O₂ → 2CuO

24. The original number of chromosomes present in the parents is restored in the progeny through a process called meiosis. During meiosis, a type of cell division, specialized cells called gametes (sperm and egg cells) are produced, each containing half the number of chromosomes as the parent cells, ensuring the maintenance of the chromosome number in the progeny.

25. The power of a lens is defined as the reciprocal of its focal length.

P = ¹/_{f (in m)} = ¹⁰⁰/_{f (in cm)}

P = ¹⁰⁰/₅₀= 2 D

26. 15 mA = ¹⁵/₁₀₀₀ A = 0.015 A

t = Q / I =750 C / 0.015 A = 50,000 seconds

27. a. Hypermetropia.

Causes of hypermetropia:

1. The focal length of the eye lens is too long.
2. The eyeball has become too small.

This defect can be corrected by using a convex lens of appropriate power. Eye-glasses with converging lenses provide the additional focussing power required for forming the image on the retina.

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