CBSE Class 10 Science Sample Paper 2024

Section-A

Select and write the most appropriate option out of the four options given for each
of the questions 1 - 20. There is no negative mark for incorrect response.

Q. Nos. Questions Marks

1

Identify the product which represents the solid state in the above reaction.
a) Barium chloride
b) Barium sulphate
c) Sodium chloride
d) Sodium sulphate
Answer : A

2 The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is
a) Blue
b) Colourless
c) Dirty green
d) Reddish Brown
Answer : B

3 Mild non-corrosive basic salt is
a) Ca (OH)₂
b) NaCl
c) NaOH
d) NaHCO₃
Answer : D

4 On adding dilute sulphuric acid to a test tube containing a metal „X‟, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal „X‟?
a) Sodium
b) Zinc
c) Copper
d) Silver
Answer : A

5 Which one of the following correctly represents Sodium oxide?

Answer : 

6 An element with atomic number_____ will form a basic oxide.
a) 7 (2,5)
b) 17 (2,8,7)
c) 14 (2,8,4)
d) 11 (2,8,1)
Answer : D

7 An element „M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of „M‟ is:
a) 10
b) 12
c) 14
d) 18
Answer : C

8 Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the body?
a) Amoeba
b) Mushroom
c) Paramoecium
d) Lice
Answer : B

9 Receptors are usually located in sense organs. Gustatory receptors are present in
a) tongue
b) nose
c) eye
d) ear
Answer : A

10 A farmer wants to grow banana plants genetically similar enough to the plants already available in his field. Which one of the following methods would you suggest for this purpose?
a) Regeneration
b) Budding
c) Vegetative propagation
d) Sexual reproduction
Answer : C

11 Height of a plant is regulated by:
a) DNA which is directly influenced by growth hormone.
b) Genes which regulate the proteins directly.
c) Growth hormones under the influence of the enzymes coded by a gene.
d) Growth hormones directly under the influence a gene.
Answer : C

12 A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to:
a) lack of carbon dioxide and formation of pyruvate.
b) presence of oxygen and formation of ethanol.
c) lack of oxygen and formation of lactic acid.
d) lack of oxygen and formation of carbon dioxide.
Answer : C

13 An object is placed in front of a convex mirror. Its image is formed :
a) at a distance equal to the object distance in front of the mirror.
b) at twice the distance of the object in front of the mirror.
c) half the distance of the object in front of the mirror.
d) behind the mirror and it‟s position varies according to the object distance.
Answer : D

14 When light enters the atmosphere it strikes on extremely fine particles, which deflect the rays of light in all possible directions, This is due to -
a) reflection of light
b) atmospheric refraction
c) scattering of light
d) dispersion of light
Answer : C

15 In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent depletion of “Y”. “X” and “Y” respectively referred here are:
a) Ozone; CFCs
b) CFCs; rays UV
c) CFCs; Ozone
d) UV rays; Diatomic oxygen
Answer : C

16 Which of the following features relates to biodegradable substances?
a) Broken down by biological processes
b) Remain inert
c) Persist in environment for long time
d) May harm the ecosystem
Answer : A

Question No. 17 to 20 consist of two statements – Assertion (A) and Reason (R). Answer these questions 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.

17 Assertion: Rusting of Iron is endothermic in nature.
Reason: As the reaction is slow, the release of heat is barely evident.
Answer : D

18 Assertion: Probability of survival of an organism produced through sexual reproduction is more than that of organism produced through asexual mode.
Reason: Variations provide advantages to individuals for survival.
Answer : A

19 Assertion : A compass needle is placed near a current carrying wire. The deflection of the compass needle decreases when the magnitude of the current in the wire is increased.
Reason : The strength of a magnetic field at a point near the conductor increases on increasing the current.
Answer : D

20 Assertion: Biodegradable substances result in the formation of compost and natural replenishment.
Reason: It is due to breakdown of complex inorganic substances into simple organic substances.
Answer : C

Please refer to attached file for CBSE Class 10 Science Sample Paper 2024