Options are not provided in the question. The complete question is as following:
During which changes of state does the motion of the atoms decrease?
A. melting and deposition
B. freezing and condensation
C. condensation and evaporation
D. vaporization and sublimation
Answer:
B. freezing and condensation
Explanation:
Matter exist in three form - solid, liquid and gas. The intermolecular force and motion of atom are inversely proportional, which means Greater the intermolecular force of attraction, slower will be the molecular motion.
The intermolecular forces of attraction decrease from solid to gas and solid has the strongest intermolecular forces. Thus, motion of the atom decrease in freezing and condensation.
Freezing changes the state from liquid to solid and condensation changes the state from gas to liquid.
Hence, the correct option is B.
