CBSE Class 10 Sample Paper Science Solution - For 2024 Boards

Question 1

Question 2 Important

Question 3

Question 4

Question 5 Important

Question 6

Question 7

Question 8 Important

Question 9

Question 10 Important

Question 11

Question 12

Question 13 Important

Question 14 Important

Question 15

Question 16 Important

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning]

Question 19 [Assertion Reasoning]

Question 20 [Assertion Reasoning] Important

Question 21

Question 22 Important

Question 23 (Choice 1) Important

Question 23 (Choice 2)

Question 24

Question 25 (Choice 1)

Question 25 (Choice 2) Important

Question 26 You are here

Question 27 Important

Question 28 (Choice 1) Important

Question 28 (Choice 2)

Question 29 Important

Question 30

Question 31 (i) Important

Question 31 (ii)

Question 31 (iii) Important

Question 32 (i)

Question 32 (ii) Important

Question 33 Important

Question 34 (Choice 1A)

Question 34 (Choice 1B) Important

Question 34 (Choice 2)

Question 35 (Choice 1)

Question 35 (Choice 2A) Important

Question 35 (Choice 2B)

Question 36 (Choice 1) Important

Question 36 (Choice 2) Important

Question 37 (a) [Case Based]

Question 37 (b) - Choice 1 [Case Based] Important

Question 37 (b) - Choice 2 [Case Based]

Question 38 (a) [Case Based] Important

Question 38 (b) [Case Based]

Question 38 (c) - Choice 1 [Case Based] Important

Question 38 (c) - Choice 2 [Case Based]

Question 39 (a) [Case Based]

Question 39 (b) [Case Based] Important

Question 39 (c) - Choice 1 [Case Based]

Question 39 (c) - Choice 2 [Case Based] Important

Study the food chain given below and answer the questions that follow:

Science Q 26.jpg

Question (A)

If the amount of energy available at the third trophic level is 100 joules, then how much energy will be available at the producer level? Justify your answer.

 

Answer:

The amount of energy available at each trophic level follows the 10% rule rule, which means that approximately 10% of the energy from one trophic level is transferred to the next trophic level. The rest is used by the organisms to carry out various life processes and some is lost as heat.

If the third trophic level has 100 joules of energy, the producer trophic level will have 10000 joules of energy.

 

Question (B)

Is it possible to have 2 more trophic levels in this food chain just before the fourth trophic level? Justify your answer.

 

Answer:

It is not possible to have 2 more trophic levels after the 4th trophic level because the loss of energy at each level is so high that very little usable energy will remain.

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo