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
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Earthquake is a desirable change.
Tick the most appropriate answer.
Physical changes are
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Name the following.
A form of energy required for a chemical change.
In a solution of salt in water, water is the solute
Classify the following changes as physical and chemical changes
A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chappathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.
| Sr. No. | Physical changes | Chemical changes |
| 1. | ||
| 2. |
