Tag: evaporation

Questions Related to evaporation

To produce salt from sea water, which phenomena is used

  1. Evaporation

  2. Vaporisation

  3. Fermentation

  4. Sublimation


Correct Option: A
Explanation:

Sea water is a mixture of water and salt , by the phenomenon of evaporisation water of this mixture is evaporated and we get salt only .

When we apply paint in our house, it dries out after some while. This happens due to what?

  1. Cooling

  2. Evaporation

  3. Fermentation

  4. None of these


Correct Option: B
Explanation:

The wet paint is dried out because liquid portion in paint is evaporated . Although evaporisation is also a type of vaporisation .


Splashes dry up at the edges of puddle due to what?

  1. Vaporisation

  2. Evaporation

  3. Sublimation

  4. Fermentation


Correct Option: B
Explanation:

Splashes dry up at the edges of puddle , because of evaporisation as high energy molecules of water escape from water .

State True or False :
Evaporation or perspiration cools our body.

  1. True

  2. False


Correct Option: A
Explanation:

Evaporation or perspiration cools our body, it is true . Because molecules of sweat in perspiration , having higher kinetic energy and it goes out in the form of sweat, hence the average kinetic energy (internal energy) of molecules in sweat decreases, therefore, its temperature gets down and we feel cooler .

When we dry our wet clothes in sun in a line then which phenomena applies to make them dry?

  1. Sublimation

  2. Fermentation

  3. Vaporisation

  4. Evaporation


Correct Option: D
Explanation:

Clothes are dried by evaporation due to heat from sunlight . In a line , clothes get sunlight for whole day , and due to heat from sun, rate of evaporation increases and clothes dry quickly .

In our daily chores when we mop our house floor then it becomes dry after some time. Which phenomena applies here?

  1. Fermentation

  2. Sublimation

  3. Vaporisation

  4. Evaporation


Correct Option: D
Explanation:

Our floor get wet due to mopping , and after some time water droplets are evaporated and floor become dry .



Which is the final step of a water cycling driving small turbines before it is fed back into the primary pool?

  1. Evaporation

  2. Fermentation

  3. Sublimation

  4. Vaporisation


Correct Option: A
Explanation:

Evaporation is the final step of a water cycling driving small turbines before it is fed back into the primary pool. Water vapours are moving in the pipe at high speed under pressure exposed to turbine; which makes turbine rotate; left water vapour again condenses and go back in liquid state.


State True or False :

A puddle on the road dries out after some while in sun due to fermentation.

  1. True

  2. False


Correct Option: B
Explanation:

A puddle on the road dries out after some time due to evaporation, not due to fermentation . 

Fermentation is a chemical breakdown of a substance by microorganism (bacteria , yeast etc.) .

State True or False :
Evaporation phenomena is used when we dry our hair with hair dryer. 

  1. True

  2. False


Correct Option: A
Explanation:

When we dry our hair , evaporisation takes place , as water droplets in hair are evaporated by air . The given statement is true .

What is not true about evaporation?

  1. Greater the surface area of the liquid, the quicker is the evaporation

  2. Evaporation produces cooling

  3. Evaporation takes place at all the temperatures

  4. Evaporation is nothing but boiling at the highest temperature of the liquid


Correct Option: D
Explanation:

Evaporization is the vaporization process of converting the liquid phase to vapour phase when surrounding temperature is more than liquid / water temperature.

It should not be confused with boiling as boiling means whole phase change from liquid to vapour at highest temperature.