SCIENCE – Code no. 086
SAMPLE QUESTION PAPER*
CLASS – X (2025-26)
Max. Marks: 80 Time Allowed: 3 hours
General Instructions:
(i) This question paper consists of 39 questions in 3 sections. Section A is Biology,
Section B is Chemistry and Section C is Physics.
(ii) All questions are compulsory. However, an internal choice is provided in some
questions. A student is expected to attempt only one of these questions.
Section – A Marks
1 Select the group in which all organisms have the same mode of nutrition. 1
A. Cuscuta, yeast, legumes, leeches and tapeworm
B. Cactus, ticks, lice, leeches and cow
C. Cuscuta, ticks, lice, leeches and tapeworm
D. Cactus, grass, lice, lion and tapeworm
2 Which of the following options indicates the products formed after breakdown 1
of the glucose in our muscle cells when there is lack of oxygen?
A. Ethanol + carbon dioxide + Energy
B. Lactic acid + Energy
C. Lactic acid + carbon monoxide + Energy
D. Carbon dioxide + Water + Energy
3 Which of the following is a correct combination of function and part of the 1
brain?
A. Posture and balance: Cerebrum
B. Salivation: Medulla in midbrain
C. Hunger: Pons in hindbrain
D. Blood pressure: Medulla in hindbrain
4 The blood glucose level in a patient was very high. It may be due to 1
inadequate secretion of:
A. growth hormone from pituitary gland
B. oestrogen from ovary
C. insulin from pituitary gland
D. insulin from pancreas
5 In a cross between black furred rabbit (B) and white furred rabbit (b), all 1
offspring were found to have black fur. What can be inferred about the genetic
makeup of the parent rabbits?
A. BB X bb
B. Bb X Bb
C. Bb X bb
D. bb X bb
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current session
i.e. 2025-26.
, 6 Which are the correct statements related to ozone? 1
(i) Ozone layer helps in increasing the UV radiations reaching earth.
(ii) Ozone is a deadly poison.
(iii) Ozone layer shields the earth from UV radiations.
(iv) Ozone layer prevents UV rays which cause skin cancer.
(v) Ozone is formed with the help of Chloroflurocarbons.
A. (i), (ii), (iii)
B. (ii), (iii), (iv)
C. (iii), (iv), (v)
D. (i), (iv), (v)
7 Which of the following human activities has resulted in an increase of non- 1
biodegradable substances?
A. Organic farming
B. Increase in tree plantation
C. Use of plastic as packaging material
D. Composting of kitchen waste
The following two questions consist of two statements – Assertion (A) and Reason (R).
Answer these questions by selecting the appropriate option given below:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
8 Assertion (A): Tallness of a pea plant is controlled by an enzyme. 1
Reason (R): The gene for that enzyme makes proteins which help the plant to
be tall.
9 Assertion (A): Vulture will always have the least amount of pesticides in a food 1
chain.
Reason (R): Vulture occupies the last trophic level and it gets only 10% of
energy of the previous trophic level.
10 Unlike animals, plants do not have any excretory products as they do not eat 2
food. Comment upon the statement with justification.
11 Students to attempt either option A or B. 2
A. How many chambers are there in the heart of the following organisms?
How is mixing of oxygenated and deoxygenated blood prevented in their
body?
(i) Fishes
(ii) Humans
OR
B. Explain the mechanism by which the water is transported in plants?
12 About 100 acres of forest land was declared as Natural reserve park. The 2
following organisms were predominant in the Natural reserve park:
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current session
i.e. 2025-26.
SAMPLE QUESTION PAPER*
CLASS – X (2025-26)
Max. Marks: 80 Time Allowed: 3 hours
General Instructions:
(i) This question paper consists of 39 questions in 3 sections. Section A is Biology,
Section B is Chemistry and Section C is Physics.
(ii) All questions are compulsory. However, an internal choice is provided in some
questions. A student is expected to attempt only one of these questions.
Section – A Marks
1 Select the group in which all organisms have the same mode of nutrition. 1
A. Cuscuta, yeast, legumes, leeches and tapeworm
B. Cactus, ticks, lice, leeches and cow
C. Cuscuta, ticks, lice, leeches and tapeworm
D. Cactus, grass, lice, lion and tapeworm
2 Which of the following options indicates the products formed after breakdown 1
of the glucose in our muscle cells when there is lack of oxygen?
A. Ethanol + carbon dioxide + Energy
B. Lactic acid + Energy
C. Lactic acid + carbon monoxide + Energy
D. Carbon dioxide + Water + Energy
3 Which of the following is a correct combination of function and part of the 1
brain?
A. Posture and balance: Cerebrum
B. Salivation: Medulla in midbrain
C. Hunger: Pons in hindbrain
D. Blood pressure: Medulla in hindbrain
4 The blood glucose level in a patient was very high. It may be due to 1
inadequate secretion of:
A. growth hormone from pituitary gland
B. oestrogen from ovary
C. insulin from pituitary gland
D. insulin from pancreas
5 In a cross between black furred rabbit (B) and white furred rabbit (b), all 1
offspring were found to have black fur. What can be inferred about the genetic
makeup of the parent rabbits?
A. BB X bb
B. Bb X Bb
C. Bb X bb
D. bb X bb
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current session
i.e. 2025-26.
, 6 Which are the correct statements related to ozone? 1
(i) Ozone layer helps in increasing the UV radiations reaching earth.
(ii) Ozone is a deadly poison.
(iii) Ozone layer shields the earth from UV radiations.
(iv) Ozone layer prevents UV rays which cause skin cancer.
(v) Ozone is formed with the help of Chloroflurocarbons.
A. (i), (ii), (iii)
B. (ii), (iii), (iv)
C. (iii), (iv), (v)
D. (i), (iv), (v)
7 Which of the following human activities has resulted in an increase of non- 1
biodegradable substances?
A. Organic farming
B. Increase in tree plantation
C. Use of plastic as packaging material
D. Composting of kitchen waste
The following two questions consist of two statements – Assertion (A) and Reason (R).
Answer these questions by selecting the appropriate option given below:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
8 Assertion (A): Tallness of a pea plant is controlled by an enzyme. 1
Reason (R): The gene for that enzyme makes proteins which help the plant to
be tall.
9 Assertion (A): Vulture will always have the least amount of pesticides in a food 1
chain.
Reason (R): Vulture occupies the last trophic level and it gets only 10% of
energy of the previous trophic level.
10 Unlike animals, plants do not have any excretory products as they do not eat 2
food. Comment upon the statement with justification.
11 Students to attempt either option A or B. 2
A. How many chambers are there in the heart of the following organisms?
How is mixing of oxygenated and deoxygenated blood prevented in their
body?
(i) Fishes
(ii) Humans
OR
B. Explain the mechanism by which the water is transported in plants?
12 About 100 acres of forest land was declared as Natural reserve park. The 2
following organisms were predominant in the Natural reserve park:
*Please note that the assessment scheme of the Academic Session 2024-25 will continue in the current session
i.e. 2025-26.
