Question

In which of the following Processes the speed of the Particles Decreases ?
A. Condensation B.Melting C.Sublimation D.Evaporation

Answer 1

heya mate,,,

the answer is (Condensation)...

Answer 2

In condensation, the speed of the particles decreases.

• The particles of the solid are closely packed so have the lowest speed. The particles of the liquid are less closely packed so have moderate speed and the particles of the gas are free so have the highest speed.
• Now in condensation, the gas is converted to liquid so, the speed of the particle decreases.
• In melting the solid is converted to liquid so, the speed of the particles increases.
• In sublimation, the solid is converted to gas so, the speed of the particle increases.
• In evaporation, the liquid is converted to gas so, the speed of the particle increases.
• Hence the correct option is A.