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CTET Solved Paper MCQ - UTET April 2015 Paper2

136 Nitrous oxide is called

N₂O is also called laughing gas. It leads to loss of consciousness when inhaled.

137 Force can be defined on the basis of

Newton's first law states that a body remains at rest or in motion with a constant velocity unless acted upon by any external agent called Force. Thus this law defines force.

138 Slope of the velocity-time graph gives the

Acceleration is the rate of change of velocity it is given by the slope of the velocity-time graph

139 Which of the following animals has the longest life span?

Tortoise has the longest life span amongst all the given animals. Their average life span is 200 years.

140 Eyes of potato are useful for

Eyes of potato are useful for vegetative propagation. It is also called asexual reproduction.

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Question:

Heat energy of an object is

A. the average energy of the molecules of the object
B. The total energy of the molecules of the object
C. the average velocity of the molecules of the object
D. the average potential energy of the molecules of the object

Correct answer: B

Explanation:

Heat energy or thermal energy of an object is the total thermal kinetic energy and thermal potential energy of all its atoms and molecules. So, we can say…

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