Question

State for each of the following whether it is due to evaporation or condensation:
a) Water drops appear on the outer surface of a glass containing cold water.
b) Steam rising from wet clothes while they are ironed.
c) Fog appearing on a cold winter morning.
d) Blackboard dries up after wiping it.
e) Steam rising from a hot girdle when water is sprinkled on it.

Answer 1

HEY , HERE IS YOUR ANS.

THE ANS IS OPTION 'A'

HOPE IT HELPS

Answer 2

Answer:  

a) 'Water drops appear on the 'outer surface of a glass' containing cold water' - Condensation

b) 'Steam rising' from wet clothes while 'they are ironed' - Evaporation  

c) 'Fog appearing on a 'cold winter morning' - Condensation  

d) 'Blackboard' dries up after wiping it' - Evaporation  

e) 'Steam rising from a hot girdle' when 'water is sprinkled on it' - Evaporation

Explanation:  

• Evaporation is the conversation of 'water in the liquid state' to water vapor when the heat is applied to it.  
• Condensation is the conversation of 'water vapor' in the water when it is cooled. The cold surface here includes the 'outer surface' of the water container and fog in cold winter morning.  
• 'Evaporation and condensation' are the opposite direction phenomenon which occurs. This evaporation and condensation together form a physical change in water.