Advertisements
Advertisements
प्रश्न
State the various conditions that favour the process of evaporation.
Advertisements
उत्तर
The various conditions that favour the process of evaporation are discussed as under :
- Concentration of water vapour in air: (humidity level) : If the water vapour concentration is high in air the evaporation process gets slowed down.
- Pressure : Evaporation takes place faster when pressure is less and vice versa.
- Surface Area: If the surface area is large then evaporation takes place faster.
- Temperature : On increasing the temperature, the rate of evaporation increases.
- Rate offlow of air : If air is moving over the place all the time, then the concentration of water vapour decreases in the surroundings, thus increasing evaporation rate.
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
Write true or false for the statement
Decomposition of leaves is a fast change.
Melting of solid (wax) is a physical change.
Classify the following changes as physical or chemical: curdling of milk
State whether the following is physical or chemical changes.
burning of sugar —
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Select the chemical changes from the following list of changes
Boiling of milk.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
