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1500 Important Physics MCQ Question and Answer PDF

4000 Important General Science MCQ Question & Answer in PDF Download

1.One kilowatt hour is equal to

  • A3.6 Mega Joule
  • B3.8 Mega Joule
  • C3.2 Mega Joule
  • D4.0 Mega Joule
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Correct Answer : (A)

3.6 Mega Joule
Explanation:

2.How much calorie of energy is released by a boiled egg?

  • A40
  • B50
  • C60
  • D77
Answer / Hint Save Question
Correct Answer : (D)

77
Explanation:

3.A boat will submerge when it displaces water equal to its own

  • AVolume
  • BWeight
  • CSurface area
  • DDensity
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Correct Answer : (B)

Weight
Explanation:

4.Surface tension in a liquid is due to

  • AAdhesive force between molecules
  • BCohesive force between molecules
  • CGravitational force between molecules
  • DElectrical force between molecules
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Cohesive force between molecules
Explanation:

5.A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to  3000  and left in a room. Which of them will have the slowest rate of cooling?

  • ACircular plate
  • BCube
  • CSphere
  • DAll will cool at the same rate
Answer / Hint Save Question
Correct Answer : (C)

Sphere
Explanation:

6.The snow on the mountains doesn't melt all at once when it is heated by the sun because

  • AIt becomes very hard
  • BIt reflects most of the heat from the sun
  • CIt has a low specific heat capacity
  • DIt has a high latent heat of fusion
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Correct Answer : (B)

It reflects most of the heat from the sun
Explanation:

7.A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is

  • AThe same in both cases in all respects
  • BOf higher intensity when train arrives
  • COf higher pitch when train Arrives
  • D Of higher pitch when train Departs
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Correct Answer : (C)

Of higher pitch when train Arrives
Explanation:

8.The velocity of sound in moist air is more than in dry air because the moist air has

  • ALess density than dry air
  • BLess pressure than dry air
  • CMore pressure than dry air
  • DMore density than dry air
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Correct Answer : (A)

Less density than dry air
Explanation:

9.An ice block with a piece of lead embed in it floats in water. If ice melts the water level

  • ARises
  • BFalls
  • CRemains same
  • DFalls first and then rises
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Falls
Explanation:

10.The plastic material commonly used for making gear wheels is

  • APolyesters
  • BNylons
  • CBakelit
  • DPolystyrene
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Nylons
Explanation:

11.When heated from 00 to 100C volume of given mass of water will :

  • AIncrease gradually
  • BDecrease gradually
  • CIncrease and then will decrease
  • DDecrease and then will increase
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Correct Answer : (D)

Decrease and then will increase
Explanation:

12.What principle/law explains the working of the hydraulic brakes in automobiles?

  • ABernoulli?s law
  • BPosieulle?s principle
  • CPascal?s law
  • DArchimedes principle
Answer / Hint Save Question
Correct Answer : (C)

Pascal?s law
Explanation:

13.Submerged objects can be located using

  • ARadar
  • BSonar
  • CQuasar
  • DPulsar
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Sonar
Explanation:

14.The Instrument used to measure the force and velocity of the wind is

  • AAmmeter
  • BAnemometer
  • CAltimeter
  • DAudiometer
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Anemometer
Explanation:

15.Woollen clothes keep the body warm because

  • AWool increases the temperature of the body
  • BWool is a bad conductor
  • CWool absorbs radiant heat from outer objects
  • DWool rejects heat from the outer objects
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Wool is a bad conductor
Explanation:

16.When a barometer reading suddenly recedes, it indicates that climate

  • AWill be very warm
  • BWill be extremely stormy
  • CWill remain cold
  • DIncessant rain for at least 48 hours
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Will be extremely stormy
Explanation:

17.Speed of sound is the greatest in :

  • AWater
  • BAir
  • CGlass
  • DGlycerine
Answer / Hint Save Question Comment On Question
Correct Answer : (C)

Glass
Explanation:

18.A gas thermometer is more sensitive than a liquid thermometer because a gas :

  • AIs lighter than liquid
  • BExpands more than a liquid
  • CIs easy to obtain
  • DDoes not change state easily
Answer / Hint Save Question Comment On Question
Correct Answer : (D)

Does not change state easily
Explanation:

19.Clothes keep us warm in winter because they

  • ASupply heat
  • BDo not radiate heat
  • CPrevent air from contacting the body
  • DPrevent the heat of the body from escaping
Answer / Hint Save Question Comment On Question
Correct Answer : (D)

Prevent the heat of the body from escaping
Explanation:

20.In a refrigerator what produces the cooling

  • AThe ice which deposits on the freezer
  • BThe sudden expansion of a compressed gas
  • CThe evaporation of a volatile liquid
  • DNone of these
Answer / Hint Save Question Comment On Question
Correct Answer : (C)

The evaporation of a volatile liquid
Explanation:
4000 Important General Science MCQ Question & Answer in PDF Download

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