GENERAL SCIENCE QUIZ with 50 MCQs SET-8

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1. When ice melts into water its

volume increases

mass increases

volume decreases

mass decreases

2. The human spinal chord is made up of _________ bones.

3. Isotopes of an element contain

Equal number of protons and electrons

The same number of neutrons but different number of protons

The same number of protons but different number of neutrons

Equal number of nucleons

4. A disease caused by the deficiency of vitamin-B is

night blindness

beri-beri

rickets

goitre

5. On a stationary sail boat, air is blown from a fan attached to the boat. The boat

Spins around

Moves in opposite direction in which the air is blown

Moves in the same direction in which air blows

Does not move

6. Identify the vector quantity from the following

Work

Heat

Angular momentum

Time

7. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?

Water, iron and air

Air, water and iron

Iron, water and air

Iron, air and water

8. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?I. DiffusionII. RefractionIII. Internal reflection

II and III

I, II and III

I and III

I and II

9. Study of life in outer space is known as

Entrobiology

Endobiology

Exobiology

Neobiology

10. Stars appears to move from east to west because

The earth rotates from west to east

All stars move from east to west

The earth rotates from east to west

The background of the stars moves from west to east

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11. Sodium metal is kept under

Petrol

Kerosene

Water

Alcohol

12. Which of the following is known as powerhouse of cell?

Ribosomes

Nucleus

Mitochondria

RNA

13. Which type of fire extinguisher is used to extinguish petroleum fires?

Soda acid type

Powder type

Foam type

None of these

14. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit

Radio waves

X-rays

Ultraviolet light

Visible light

15. It is more difficult to walk on a sandy road than on a concrete road because

The sand is grainy but concrete is smooth

Sand is soft and concreter is hard

The friction between sand and feet is more than that between concrete and feet

The friction between sand and feet is less than that between concrete and feet

16.

Primary rainbow is formed when light suffers

Either one or two internal refractions before emerging out of the drop

One internal refractions before emerging out of the drop

Two internal refractions before emerging out of the drop

No internal refraction

17. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

Intense sunlight at noon

Both the heating effect of current and hysteresis loss

Hysteresis loss alone

The heating effect of current alone

18. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

Kinetic energy

Acceleration

Momentum

Velocity

19. Intensity of sound at a point is __________ its distance from the source.

Inversely proportional to square of

Inversely proportional to

Directly proportional to

Directly proportional to square of

20. Light travels at the fastest speed in

Hydrogen

Glass

Water

Vacuum

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21. RADAR is used for

Locating geostationary satellites

Locating submerged submarines

Detecting and locating the position of objects such as aeroplanes

Receiving a signals in a radio receiver

22. Optical fibres are based on the phenomenon of

dispersion

interference

total internal reflection

diffraction

23. Supersonic plane fly with the speed

Of light

Of sound

Greater than the speed of sound

Less than the speed of sound

24. Radiocarbon is produced in the atmosphere as a result of

Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

Collision between fast neutrons and nitrogen nuclei present in the atmosphere

Lightning discharge in atmosphere

Action of ultraviolet light from the sun on atmospheric oxygen

25. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is

33 km

1200 m

3.33 km

0.33 km

26. Stars twinkle because

The light from the star is scattered by the dust particles and air molecules in the earth's atmosphere

The refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time

The distance of the stars from the earth changes with time

The intensity of light emitted by them changes with time

27. Anemometer is an instrument used to

measure humidity

measure precipitation

measure wind speed

find the wind direction

28. Magnetism at the center of a bar magnet is

Minimum or maximum

Maximum

Minimum

Zero

29. DNA does not have

adenine

uracil

thymine

guanine

30. The hepatitis-B, which affects liver is actually a

bacterium

virus

protozoan

helminth

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31. Which of the following is made up of muscular walls?

Skin

Blood

Heart

Bone

32. One horsepower is equal to

748 watts

746 watts

736 watts

756 watts

33. When a strong beam of light is passed through a colloidal solution, the light will

be reflected

pass unchanged

be scattered

be absorbed

34. The element required for solar energy conversion is

Ultra Pure carbon

Tantalum

Beryllium

Silicon

35. Oil raise up the wick in a lamp. The principle involves

The diffusion of oil through the wick

The liquid state of oil

Volatility of oil

Capillary action phenomenon

36. Rectifiers are used to convert

High voltage to low voltage

Low voltage to high voltage

Direct current to Alternating current

Alternating current to Direct current

37. Which of the following is not a bone in the legs of the human body?

Femur

Radius

Tibia

Fibula

38. Radiocarbon is produced in the atmosphere as a result of

Lightning discharge in atmosphere

Collision between fast neutrons and nitrogen nuclei present in the atmosphere

Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

Action of ultraviolet light from the sun on atmospheric oxygen

39. Point ‘A’ is at a lower electrical potential than point ‘B’. An electron between them on the line joining them will

Move towards B

Move at right angles to the line joining A and B

Move towards A

Remain at rest

40. Sweat glands occur in greatest number in skin of the

Armpits

Back

Forehead

Palm of Hand

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41. Which of the following coloured light has the lowest frequency?

Red

Violet

Green

Blue

42. Out of the following pairs, which one does not have identical dimension?

Moment of inertia and moment of a force

Impulse and Momentum

Angular momentum and Planck's constant

Work and Torque

43. Which disease is caused by iodine deficiency?

Night blindness

Scurvy

Rickets

Goitre

44. RNA plays an important role in

protein synthesis

all of these

glucose synthesis

fat synthesis

45. Of the following properties of a wave, the one that is independent of the other is its

Frequency

Velocity

Amplitude

Wavelength

46. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

Depressed

Will overflow

Will not rise

Change its meniscus

47. Blood Grouping was discovered by

Karl Landsteiner

Louis Pasteur

Robert Koch

William Harvey

48. It takes much longer to cook food in the hills than in the plains, because

In the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100°C causing an increase in cooking time

In the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking

Due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100°C and therefore water takes longer to boil

In the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere

49. Photosynthesis takes place faster in

White light

Darkness

Yellow light

Red light

50. Animal cells are different from plant cell in not having?

dictyosome

plastids

lysosome

cell wall

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