Class 8 Science Half Syllabus Test 1

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Chapters covered : 1, 4, 5, 6, 8, 12, 13, 14, 16

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Ques. No. 1-45 (1 marks each)

Only one option is correct

1. Which of the following is not a harvest festival?

1 point

Holi

Pongal

Baisakhi

Dussehra

Clear selection

2. Who among the following cannot make their own food?

1 point

Bacteria

Plants

Humans

Both a & c

Clear selection

3. Pulses and vegetables are grown in which season?

1 point

Winter season

Summer season

Rainy season

Kharif Season

Clear selection

4. Which can be said as a friend of farmers?

1 point

Microbes

Earthworm

None

Both a & b

Clear selection

5. Which can not be used to restore lemon pickle?

1 point

Plastic jar

Glass jar

Aluminium jar

None of these

Clear selection

6. If iron nails are placed in copper sulphate solution , then which of the following reaction would happen?

1 point

No reaction

Displacement reaction

Copper displaced

Both b & c

Clear selection

7. Which of the following is incorrect?

1 point

Phosphorus is stored in water to prevent the contact of phosphorus with atmospheric oxygen.

The size of atom of water and ice is different

Silver gets rusted is exposed to air.

The green coating on copper is mixture of Cu(OH)2 and CuCO3

Clear selection

8. Which of the following is odd one out?

1 point

Caesium

Sodium

Mercury

Iron

Clear selection

9. An element which is used in water purification is.

1 point

A metalloid

Non metal

Metal

Semi solid

Clear selection

10. Which of the following is incorrect?

1 point

Magnesium is more reactive than copper

Iron can't displace calcium from its salt solution

Zinc is more reactive than both iron and silver

Copper is least reactive among Aluminium, copper, silver and potassium

Clear selection

11. Which of the given below should be used to used judiciously?

1 point

Coal

Natural gas

Petroleum

All

Clear selection

12. Which of the following is correct full form of PCRA?

1 point

Petroleum and Coal Research Association

Petroleum Conservation Research Association

Petrol Control and Reuse Association

Petroleum and Natural Gas Association

Clear selection

13. Which of the following is best form of coal containing 95% carbon?

1 point

Lignite

Anthracite

Peat

Bituminous

Clear selection

14. Which is used in road surfacing?

1 point

Only Lubricating oil

Only bitumen

Only coal tar

Both b & c

Clear selection

15. Which is a bad consequence of burning fuels?

1 point

Global warming

Acid rain

Deforestation

All of the above

Clear selection

16. The zone having unburnt carbon particles is

1 point

Non luminous zone

Luminous zone

Innermost zone

Both b & c

Clear selection

17. Nuclear reaction takes place in

1 point

Sun

Stars

Moon

Both a & b

Clear selection

18. The reaction which takes place without the application of any external source is

1 point

Rapid reaction

Spontaneous reaction

Explosion

None

Clear selection

19. What is the calorific value of a fuel which produces 15000 kJ heat on burning 7.5 kg of that fuel?

1 point

20 KJ/kg

2000 J/kg

2000 kJ/kg

2000 kg/kJ

Clear selection

20. The first living cell was discovered by

1 point

Anton Von Leeuwenhoek

Robert Brown

Robert Hooke

Both a & c

Clear selection

21. What is the size of smallest cell?

1 point

1.0 μ - 1.5 μ

0.5 μ - 1.0 μ

0.1 μ - 0.5 μ

0.5 μ - 0.6 μ

Clear selection

22. A group of cells that perform similar function together forms what?

1 point

Organism

Organ

Tissue

Organ System

Clear selection

23. What is the shape of muscle cell?

1 point

Spherical

Biconcave

Spindle shaped

Long and branched

Clear selection

24. A single celled organism cannot perform which function?

1 point

Respiration

Growth

Reproduction

None of these

Clear selection

25. Which of giving statement is false?

1 point

The number of cell in giraffe is more than number of cell in goat

The size of cell in rat is smaller than size of cell in elephant

Both of the above

None of these

Clear selection

26. Which of the statement is incorrect about friction?

1 point

It always opposes the relative motion between two moving surface

It sometimes supports the motion

If the surface on which object is moving is made smooth (but not perfectly), then friction is reduced to zero

All of the above

Clear selection

27. Which of the following about the direction of friction is correct?

1 point

Option A

Option B

Option 3

Option 4

Clear selection

28. A device used for measuring force consisting of coiled spring is

1 point

Barometer

Weighing machine

Spring balance

Spring potential

Clear selection

29. The sound in mridangam is produced by

1 point

String

Air column

Spring

Membrane

Clear selection

30. Which represents the sound of low-voiced women?

1 point

Option A

Option B

Option C

Option D

Clear selection

31. What is frequency?

1 point

Number of oscillations per second

Number of to and fro motions per second

Frequency = 1/T, where T = time period

All of the above

Clear selection

32. If the amplitude is tripled, the loudness

1 point

Increases by three times

Decreases by three times

Increases by six times

Increases by nine times

Clear selection

33. What is true about vacuum?

1 point

Light doesn't travel in vacuum

Sound travels faster than light in vacuum

There is vacuum in space

All of the above

Clear selection

34. Sound is produced by

1 point

Vocal cords

Vibration

Voice box

String

Clear selection

35. Which of the following can not be used to electroplate other objects?

1 point

Tin

Chromium

Copper

Both A & B

Clear selection

36. To electroplate something with copper, which of the given solutions is used as electrolyte?

1 point

Na2SO4

CuSO4

Any of the above

None of the above

Clear selection

37. Observe the given diagram and tick the correct answer.

1 point

A terminal is positive electrode

B terminal is negative electrode

A terminal is cathode

Both a & b

Clear selection

38. Who showed that on electrolysing water, Hydrogen and Oxygen are formed on different electrodes?

1 point

Ostwald

Singer

Nicholson

Sanger and Nicholson

Clear selection

39. Which of the following is/are insulator/s?

1 point

Distilled water

Air

Tap water

Both A & B

Clear selection

40. If the reflected ray makes a 60° angle with the incident ray. Then, what angle would the incident ray make with the mirror?

1 point

90°

60°

45°

30°

Clear selection

41. The owl's eye has

1 point

Less rods than cones

Less cones than rods

Large cornea to allow more light

Both B & C

Clear selection

42. Splitting of light into various colours is called

1 point

Reflection

Breaking

Dispersion

Repression

Clear selection

43. The part of the eye that controls the amount of light entering the eye and the part that gives colour to the eye are respectively

1 point

Iris and pupil

Pupil and cornea

Iris and Iris

Pupil and iris

Clear selection

44. At old age, the lens becomes foggy. This is known as

1 point

Farsightedness

Nearsightedness

Hypermetropia

Cataract

Clear selection

45. The size of eyeball is

1 point

1 cm

5/2 cm

5 cm

None

Clear selection

Ques. No. 45-50 (3 marks each)

More than one option may be correct (Tick all correct options)

46. Which of the following is correct?

3 points

The normal is always perpendicular to the mirror

If incident ray makes 90° with the mirror, then the angle of reflection = 0

If angle i = 45°, then angle between angle i and angle r is 90°

Incident ray is always on the left side of the normal

47. The sound above frequency 20 kHz

3 points

Are called ultrasound

Can be used heard by rhinoceros

Can be used to measure depth of sea

Has 20,000 vibrations in one second

48. Which of the following is correct about LPG?

3 points

It has higher calorific value than CNG

It is found in gaseous form in the cylinder

It is an inflammable substance

It is obtained from coal gas

49. Select the incorrect statement.

3 points

Silicon is a metalloid

Metalloids possess the characteristics of both metal and non metal. That is why it is made up of two kind of atoms (i.e., metal atoms and non metal atoms)

The total non liquid elements are 92 at room temperature (If total discovered elements are 94)

Zinc Sulphate + Copper turning -> Copper Sulphate + Zinc

50. A real image can be formed by

3 points

Option 1

Option 2

Convex mirror

Concave mirror

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