SCIENCE – CODE NO. 086
SAMPLE QUESTION PAPER*
CLASS – X (2026-27)
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 the alternatives in
these questions.
Section – A
1 During photosynthesis, what happens to carbon dioxide and water as glucose is 1
formed?
A. Carbon dioxide gains hydrogen, while water loses electrons.
B. Carbon dioxide loses oxygen, while water gains oxygen.
C. Carbon dioxide is oxidised, while water is reduced.
D. Both carbon dioxide and water undergo reduction.
2 Lime water turns cloudy in the presence of a gas, which is a by-product of 1
respiration. Shown below are four setups kept in sunlight for 24 hours. In which
setup is lime water expected to be the cloudiest?
A. P
B. Q
C. R
D. S
--------------
For visually impaired students
Which of the following statement is incorrect concerning the experiment to
show that sunlight is necessary for photosynthesis?
A. The leaf should be destarched before conducting the experiment.
B. The leaf kept in darkness will show the presence of starch.
C. The leaf exposed to sunlight will show the presence of starch.
D. Starch is the end product of photosynthesis.
*There is no change in the Question Paper Design and Assessment Pattern for Academic Session 2026-27.
, 3 During urine formation, tubular reabsorption and secretion take place in the 1
kidneys. Which of the following sets correctly indicates both the substances that
are reabsorbed in the kidneys?
A. Glucose and salts
B. Glucose and starch
C. Glycogen and salts
D. Glycogen and starch
4 In a controlled experiment, the anthers of a mustard plant's flowers were 1
carefully removed in the bud stage before they matured. The bud was covered
with a paper bag.
What will be the most likely result for these flowers?
A. They will still produce seeds and fruit through self-pollination.
B. They will attract more insects and produce larger flowers but no fruit.
C. They will not produce any seeds or fruits.
D. They will produce seeds and fruits that are genetically identical to the
parent.
5 The Vas deferens and the Oviduct are both targets for surgical contraception 1
(Vasectomy and Tubectomy respectively). Analysing the process of
reproduction, what common biological event is prevented by blocking both these
structures?
A. The production of gametes (sperm and egg).
B. The implantation of the fertilized egg into the uterine wall.
C. The successful meeting and fusion of the male and the female gametes.
D. The release of hormones - testosterone and estrogen.
6 The male gamete of an apple plant has seventeen chromosomes. What is the 1
number of chromosomes in the female gamete and in the cells of the adult plant
respectively?
A. 17,17
B. 17,34
C. 34,34
D. 34,51
7 A fish living in a pond ecosystem feeds on small aquatic insects (larvae). These 1
insect larvae, in turn, feed on green algae and small photosynthetic bacteria.
In this specific food chain, what is the trophic level classification of fish?
A. Producer
B. Primary Consumer
C. Secondary Consumer
D. Tertiary Consumer
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.
*There is no change in the Question Paper Design and Assessment Pattern for Academic Session 2026-27.
SAMPLE QUESTION PAPER*
CLASS – X (2026-27)
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 the alternatives in
these questions.
Section – A
1 During photosynthesis, what happens to carbon dioxide and water as glucose is 1
formed?
A. Carbon dioxide gains hydrogen, while water loses electrons.
B. Carbon dioxide loses oxygen, while water gains oxygen.
C. Carbon dioxide is oxidised, while water is reduced.
D. Both carbon dioxide and water undergo reduction.
2 Lime water turns cloudy in the presence of a gas, which is a by-product of 1
respiration. Shown below are four setups kept in sunlight for 24 hours. In which
setup is lime water expected to be the cloudiest?
A. P
B. Q
C. R
D. S
--------------
For visually impaired students
Which of the following statement is incorrect concerning the experiment to
show that sunlight is necessary for photosynthesis?
A. The leaf should be destarched before conducting the experiment.
B. The leaf kept in darkness will show the presence of starch.
C. The leaf exposed to sunlight will show the presence of starch.
D. Starch is the end product of photosynthesis.
*There is no change in the Question Paper Design and Assessment Pattern for Academic Session 2026-27.
, 3 During urine formation, tubular reabsorption and secretion take place in the 1
kidneys. Which of the following sets correctly indicates both the substances that
are reabsorbed in the kidneys?
A. Glucose and salts
B. Glucose and starch
C. Glycogen and salts
D. Glycogen and starch
4 In a controlled experiment, the anthers of a mustard plant's flowers were 1
carefully removed in the bud stage before they matured. The bud was covered
with a paper bag.
What will be the most likely result for these flowers?
A. They will still produce seeds and fruit through self-pollination.
B. They will attract more insects and produce larger flowers but no fruit.
C. They will not produce any seeds or fruits.
D. They will produce seeds and fruits that are genetically identical to the
parent.
5 The Vas deferens and the Oviduct are both targets for surgical contraception 1
(Vasectomy and Tubectomy respectively). Analysing the process of
reproduction, what common biological event is prevented by blocking both these
structures?
A. The production of gametes (sperm and egg).
B. The implantation of the fertilized egg into the uterine wall.
C. The successful meeting and fusion of the male and the female gametes.
D. The release of hormones - testosterone and estrogen.
6 The male gamete of an apple plant has seventeen chromosomes. What is the 1
number of chromosomes in the female gamete and in the cells of the adult plant
respectively?
A. 17,17
B. 17,34
C. 34,34
D. 34,51
7 A fish living in a pond ecosystem feeds on small aquatic insects (larvae). These 1
insect larvae, in turn, feed on green algae and small photosynthetic bacteria.
In this specific food chain, what is the trophic level classification of fish?
A. Producer
B. Primary Consumer
C. Secondary Consumer
D. Tertiary Consumer
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.
*There is no change in the Question Paper Design and Assessment Pattern for Academic Session 2026-27.
