In which of the following processes, change in the state of matter involves absorption of energy?
A. Boiling
B. Freezing
C. Condensation
D. Melting

A only

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A and B only

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A, B and C only

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A and D only

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Solution

The correct option is D A and D only
There will be an absorption of heat energy in the process of melting and in boiling. This energy is used the material to break covalent bonds between molecules and hence, phase change occurs.
Whereas in condensation as well as in freezing, heat energy is released (temperature reduced).

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In which of the following processes, change in the state of matter involves absorption of energy? A. Boiling B. Freezing C. Condensation D. Melting

In which of the following processes, change in the state of matter involves absorption of energy?
A. Boiling
B. Freezing
C. Condensation
D. Melting