The conversion of liquid state into gaseous state is called …………
a) condensation
b) evaporation
c) crystallization
d) sublimation
The molecules of gases liquids have ……… kinetic energy.
a) same
b) different
c) a & b both
d) none of these
Evaporation causes ……….
a) heating
b) cooling
c) smelling
d) ignition
Explanation:During evaporation, the liquid particles at the surface get heated and start vibrating at a greater amplitude. These particles move into a gaseous phase as the bond between them and the rest of the liquid breaks. This reduces the average energy possessed by the liquid and thus causes a cooling effect.
Evaporation takes place at ………. .
a) low temperature
b) high temperature
c) all temperatures
d) none of these
Evaporation depends on …………..
a) surface area
b) temperature
c) intermolecular forces
d) all of these
Lower the surface area ………… will be evaporation.
a) lower
b) higher
c) much higher
d) has no effect
Explanation:Lower the surface area, lower molecules are available to escape so rate of evaporation will be low.
