Question 1.
Absolute Zero is defined as
A. The temperature at which all molecular motion ceases
B. At which water boils at 298K
C. At which liquid Helium boils
D. At which the volume becomes zero
Ans: A. The temperature at which all molecular motion ceases
Question 2.
A gas thermometer is more sensitive than a liquid thermometer because a gas :
A. Is lighter than liquid
B. Expands more than a liquid
C. Is easy to obtain
D. Does not change state easily
Ans: B. Expands more than a liquid
Question 3.
A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will
A. First rise and then fall
B. Fall
C. Remain the same
D. Rise
Ans: C. Remain the same
Question 4.
When a steel ball is placed on the surface of mercury, it does not sink because
A. Of the surface tension of mercury
B. Mercury is a semisolid
C. Of the high viscosity of mercury
D. The density of mercury is greater than that of steel
Ans: D. The density of mercury is greater than that of steel
Question 5.
At what temperature (in degree Celsius), the numerical values on Celsius and Fahrenheit scales become equal?
A. –40
B. 40
C. 273
D. –273
Ans: A. –40
Question 6.
What is the SI unit of temperature?
A. Kelvin
B. Joule
C. Celsius
D.Fahrenheit
Ans: A. Kelvin
Question 7.
The magnitude of buoyant force depends on the __ of the fluid.
A. Mass
B. Temperature
C. Volume
D. Density
Ans: D. Density
Question 8.
Clouds float in the atmosphere because of their
A. Low pressure
B. Low density
C. Low viscosity
D. Low temperature
Ans: B. Low density
Question 9.
At what temperature (in Fahrenheit) pure water freezes?
A. 32
B. 0
C. 48
D. 37
Ans: A. 32
Question 10.
Earliest thermometer was developed by
A. Celsius
B. Fahrenheit
C. Kelvin
D. Galileo
Ans: D. Galileo
Question 11.
A solid needle placed horizontally on the surface of the water floats due to
A. Capillary action
B. Water pressure
C. Surface tension of water
D. Viscosity of water
Ans: C. Surface tension of water
Question 12.
When a ship enters the sea from a river
A. It rises a little
B. It sinks a little
C. It remains at the same level
D. It rises or sinks depending on the material it is made of
Ans: A. It rises a little
Question 13.
On the Kelvin scale, the melting point of ice is
A. 373K
B. 100K
C. 273K
D. 0 K
Ans: C. 273K
Question 14.
The absolute zero is a temperature at which __
A. Molecular motion in a gas would cease
B. Water freezes
C.All gases become liquid
D. All gases become solid
Ans: A. Molecular motion in a gas would cease
Question 15.
Purity of a metal can be determined with the help of
A. Pascal’s law
B. Boyle’s law
C. Archimedes principle
D. Conservation of mass principle
Ans: C. Archimedes principle
Question 16.
The apparent weight of a man in a lift is less the real weight when :
A. The lift is going up with an acceleration
B. The lift is going down with uniform speed
C. The lift is going up with uniform speed
D. The lift is going down with an acceleration
Ans: D. The lift is going down with an acceleration
Question 17.
The temperature which has the same reading on both Fahrenheit and Celsius scales is
A. 40°
B. –40°
C. 0°
D. 32°
Ans: B. –40°
Question 18.
Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be
A. At a higher level in water
B. At a higher level in alcohol
C. At the same level in both
D. Floating in alcohol and sinking in water
Ans: A. At a higher level in water
Question 19.
Buoyancy depends on
A. The mass of the liquid displaced
B. The mass of the body
C. The depth to which the body is immersed
D. The shaped of the body
Ans: A. The mass of the liquid displaced
Question 20.
A balloon filled with hydrogen will
A. Continue going upwards uninterrupted
B. Reach a particular height and remain floating
C. Burst after reaching some height
D. Reach a particular height and start coming down
Ans: B. Reach a particular height and remain floating
Physics GK MCQs all set
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