The following Questions of Class 10 Science Sample Paper Solution are given below.
Model Question Paper 2021 class 10 | Class 10 Science Sample Paper Solution
Science Sample Paper 4
1. Iron nails are dipped in CuSO4, solution for some time. What will be the effect on iron nail’s colour ?
(a) No effect
(b) Becomes green
(c) Becomes white
(d) Becomes brownish
Ans. d
2. The lens used to correct myopia is :
(a) Convex lens
(c) Cylindrical lens
(d) Bifocal lens
(b) Concave lens
Ans. b
3. If magnification produced by a spherical mirror is positive, then the image is :
(a) Diminshed
(b) Real
(c) Virtual
(d) Inverted
Ans. c
4. What will be the resistance of 100 W-220 V lamp, when not in use?
(b) 400 Ω
(a) 48 Ω
(c) 484 Ω
(d) 48.4 Ω
Ans. c
5. A Solar cell converts :
(a) Electric energy into mechanical energy
(b) Solar energy into electrical energy
(c) Solar energy into chemical energy
(d) None of the above
Ans. b
6. The metallic character down a group
(b) Increases
(a) Decreases
(c) Does not change
(d) None of these
Ans. b
7. Sunil conducts an activity using an object of height 10 cm and a convex mirror of focal length 20 cm. He placed the object at a distance of 20 cm in front of the mirror. What is the height of the image produced ?
(a) I cm
(b) 5 cm
(c) 10 cm
(d) 20 cm
Ans. b
8. Which of the following is not ultimately derived from the Sun’s energy?
(a) Geothermal energy
(b) Wind energy
(c) Fossil fuels
(d) Bio-mass
Ans. a
9. The twinkling of stars is due to:
(a) Reflection
(b) Atmospheric refraction
(c) Dispersion
(d) None of these
Ans. b
10. Oxidation is a process which involves:
(a) Addition of oxygen
(b) Addition of hydrogen
(c) Removal of oxygen
(d) None of these
Ans. a
sample paper 2021 class 10 term 1
11. What is the commercial unit of electrical energy ?
(b) Kilojoule
(a) Joule
(c) Kilowatt-hour
(d) Watt-hour
Ans. c
12. Appliances that have metal body are generally connected to the earthing wire. What is the reason to earth these wires ?
(a) To prevent excess of current
(b) To avoid severe electric shock
(c) To provide extra current to the appliance
(d) None of these
Ans. b
13. Charcoal is a good fuel because it:
(a) Burns without flames
(b) Is almost smokeless
(c) Has a higher heat generation efficiency
(d) All of the above
Ans. d
14. Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is :
(b) 14
(d) 16
(a) 7
(c) 24
Ans. b
15. We need to use our resources carefully because :
(a) These are not unlimited
(b) Their demand is increasing
(c) Both (a) as well as (b)
(d) None of the above
Ans. c
17. A person uses a convex lens of focal- length 20 cm in his spectacles. The power of the lens is:
(a) – 5D
(b) +5D
(c) +2D
(d) – 2D
Ans. b
18. A typical solar cell develops a voltage of about :
(a) 0.5 to 1 volt
(b) 2 to 3 volt
(c) 1.5 to 2.5 volt
(d) 3 to 4 volt
Ans. a
19. The size of the image of an object produced on a screen using a convex lens is 36cm. The image produced is about 3 times the size of the object. What is the size of the object ?
(a) 12 cm
(b) 33 cm
(c) 39 cm
(d) 108 cm
Ans. a
20. Which of the following constitute a food- chain ?
(a) Grass, wheat and mango
(b) Grass, goat and human beings
(c) Goat, cow and elephant
(d) Grass, fish and goat
Ans. b
21. MnO2 + 4HCI ->MnCl2+2H20+Cl2 Identify the substance oxidized in the above equation :
(b) HCI
(a) MnCl2
(c) H2O
(d) MnO2
Ans. b
22. An element X from group 2 of the Periodic Table reacts with an element Y from group 17 to form a compound. Give the formula of the compound.
(a) XY2
(b) XY
(c) X2Y
(d) (XY)2
Ans. a
23. Water harvesting is .. concept in India :
(a) New
(b) Age-old
(c) Both (a) as well as (b)
(d) None of these
Ans. b
24. A current through a horizontal power line flows from South to North direction. The direction of magnetic field line 0.5m above it is :
(a) North
(b) South
(c) West
(d) east
Ans. d
25. The wavelength of red colour is about … times that of blue colour :
(b) 1.4
(d) 1.8
(a) 1.2
(c) 1.6
Ans. d
26. Which of the following is not a fossil fuel ?
(a) Coal
(b) Wood
(c) Petroleum
(d) None of these
Ans. b
27. Which one of the following will undergo fastest bio-degradation?
(a) Mango seed
(c) Mango peel
(b) Wood
(d) Mango pulp
Ans. d
29. The atomic size….. down the group :
(a) Increases
(b) Remains the same down the
(c) Decreases
(d) None of the above
Ans. a
30. You are given three media A, B and C of refractive indices 1.33, 1.65 and 1.46. The medium in which the light will travel slowest is :
(a) A
(b) B
(c) C
(d) equal in all three media
Ans. b
31. Which of the following is/are natural resource / resources ?
(a) Water
(b) Forests
(d) All of the above
(c) Coal
Ans. d
32. A D.C generator works on the principle of :
(a) Ohm’s law
(b) Joule’s law of heating
(c) Faraday’s law of electromagnetic induction.
(d) None of the above
Ans. c
33. Chemical formula of ferric oxide is :
(a) FeO2
(c) Fe2O3
(b) Fe3O2
(d) Fe3O4
Ans. c
34. Which of the following source/sources can be used to generate electricity ?
(a) Tidal energy
(c) Solar Energy
(b) Wave energy
(d) All of the above
Ans. d
35. A full length image of a distant tall building can definitely be seen by using :
(a) a concave mirror
(b) a convex mirror
(c) a plane mirror
(d) both (a) as well as (c)
Ans. b
36. When silver (Ag) is exposed to air, it gets a black coating of :
(a) AgNO3
(b) Ag2S
(c) Ag2O
(d) Ag2CO3
Ans. b
38. An ecosystem includes :
(a) All living organisms
(b) Non-living objects
(c) Both living organisms as well as non- living objects
(d) None of these
Ans. c
39. Who gave the Right Hand Thumb Rule ?
(b) Fleming
(d) Maxwell
(a) Orsted
(c) Einstein
Ans. d
40.The chemical formula of ozone is :
(a) O2
(c) O4
(b) 03
(d) O5
Ans. b
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