Question : The average kinetic energy of the molecules of an ideal gas is directly proportional to:
Option 1: velocity of molecules
Option 2: mass of molecules
Option 3: absolute temperature of the gas
Option 4: temperature of environment
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Correct Answer: absolute temperature of the gas
Solution : The correct option is absolute temperature of the gas.
An ideal gas's average molecular kinetic energy (KE) is directly proportional to its temperature (T), expressed in Kelvin. The average kinetic energy of molecules in an ideal gas increases with temperature and vice versa, providing all other variables remain constant.
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Question : In which form is the supplied heat energy stored during change in temperature of substance?
Option 1: Heat energy
Option 2: Kinetic energy
Option 3: Potential energy
Option 4: Both kinetic and potential energy
Question : Kinetic energy depends on:
Option 1: the velocity or speed of the moving body
Option 2: the mass of the moving body
Option 3: the pressure of the moving body
Option 4: both mass and velocity of the moving body
Question : A real gas can act as an ideal gas in:
Option 1: high pressure and low temperature
Option 2: low pressure and high temperature
Option 3: high pressure and high temperature
Option 4: low pressure and loe temperature
Question : If both the mass and the velocity of a body are increased to twice their magnitude, the kinetic energy will increase by:
Option 1: 2 times
Option 2: 4 times
Option 3: 8 times
Option 4: 16 times
Question : Which of the statements is not correct regarding energy?
Option 1: The energy possessed by a body due to its change in position or shape is called potential energy.
Option 2: An object of mass m moving with velocity v has a kinetic energy of (mv)/2.
Option 3: The gravitational potential energy of an object of mass, M raised through a height, H from the Earth's surface is given by MgH.
Option 4: An object in motion possesses what is known as the kinetic energy of the object.
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