Tag: let's play with water

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Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

When you get in your car in the morning and are breathing warmer air, the warm air comes into contact with the cooler windshield and forms a foggy window. It is an example of :

  1. evaporation

  2. sublimation

  3. condensation

  4. both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Condensation is the process by which water vapor in the air is changed into liquid water.Cloud formation is caused by condensation of water vapor in the atmosphere condensing into a liquid state. Thus Option C is correct.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

The process of changing water vapour into water is called:

  1. boiling

  2. evaporation

  3. melting

  4. condensation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The process of changing water vapour into water is called condensation.

Condensation is simply the process of change of the vapour from gaseous state to liquid when comes in contact of cool surface.
And this process can't be boiling as in boiling we have to provide heat and it is the change of liquid state into vapour form.
And the process is not evaporation as it also changes water into vapour.
Melting is not the required process as it is the change of state from solid to liquid.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Evaporation causes:

  1. cooling

  2. heating effect

  3. an increase in weight

  4. an increase in density
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation causes cooling.

Because in evaporation the water changes form liquid to vapour state so the vapour of water causes the surface to becomes cool.
Evaporation causes cooling because during evaporation the particle of the liqued absord energy from the surroundings to regain the energy lost during evaporation. the absorbtion of heat from the surrounding makes the surrounding  cool.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Which of the following is an example of evaporation?

  1. Drying of hair

  2. Preparation of common salt from sea water

  3. Dew in the morning

  4. Cooling of hot tea
Reveal answer Fill a bubble to check yourself
A,B,D Correct answer
Explanation
Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.
Drying of leads to water loss in hair or water evapouration leads to water evapouration.
Producing of salt also leads of water evaporation from salted water.
Cooling of hot tea leads to water codensation not evaporation.
Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

In which of the following processes evaporation involves

  1. Hot tea gets cool over time

  2. Preparation of common salt from sea water

  3. Wet clothes dry in sun

  4. A,B,C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is the process of a liquid converts into gaseous phase. In all these process liquid moles are evaporated into gaseous phase. Hence, option D is correct.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Drying clothes is an example of :

  1. condensation

  2. evaporation

  3. hydration

  4. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Drying clothes is an example of evaporation as in evaporation water evaporates by the heat of the sun thus helping in drying of clothes .

And hydration means the process of absorbing water .
And condensation means water that collects as droplets on a cold surface when humid air is in contact with it.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Evaporation is the process of a substance in:

  1. liquid form transitioning into the gas phase

  2. solid form transitioning into the gas phase

  3. liquid form transitioning into the solid phase

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation of the substance is the process in which the substance transition from liquid phase to gas phase. Condensation is the process in which gas returns to liquid form. Hence, options A is correct.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

The fog appeared on sun glasses when it get in contact with steam

  1. Condensation

  2. Evaporation

  3. Sublimation

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fog appeared on sun glasses when gets in front of hot steam due to condensation.Condensation is the process where the vapor converts into liquid.
Hence option A is correct.