Answer: Therefore, options A and C are correct.
A) While condensation, the temperature of the substance is increased.
C) At boiling, the temperature of the substance remains constant.
Explanation:
A) In condensation, the gas molecules release energy to the substance and get converted to the liquid state.
Thus, the energy of the substance increases as it gains the energy released by the gas molecules.
B) while freezing the temperature of the substance decreases as it releases energy.
C) In boiling, the temperature of a substance remains constant as the temperature of the substance remains constant at its melting and boiling points until all the substance melts or boils as the heat supplied is continuously used up in changing the state of the substance by overcoming the forces of attraction between the particles.
Therefore, options A and C are correct.