Tag: chemistry

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Questions Related to chemistry

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

While putting clothes for drying up, why do we spread them out?

  1. Surface area is directly proportional to rate of evaporation.

  2. Increase in surface area decreases rate of evaporation.

  3. Increase in surface area increases rate of evaporation.

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

Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. While putting clothes for drying up, we spread them out, because, more area is exposed to sun and wind which speeds up the rate of evaporation.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Identify the factors which cause evaporation?

  1. High pressure on water surface

  2. Specific heat

  3. Latent energy

  4. All of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation is the surface phenomenon in which if their high-pressure present on the surface of the liquid, it reduces the rate of evaporation. 


Storms are examples of high-pressure systems that slow down evaporation.

Therefore, the option is A.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Evaporation is a _______ phenomenon.

  1. surface

  2. bulk

  3. solid

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Surface phenomenon is a process in which only the surface of the any substance or object is involved in the process. In Evaporation only surface of the liquid involves in the process, its bulk remain unaffected by evaporation. Hence, it is a surface phenomenon. 

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Which of the following plays an important part while drinking a liquid with a straw?

  1. Humidity

  2. Temperature

  3. Atmospheric pressure

  4. Composition of air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When you suck on a straw, stuck into liquid it lowers the pressure in the straw. That makes atmospheric pressure higher than the pressure in the straw which force the liquid to go up into the straw and into your mouth. So, atmospheric pressure plays important role while drinking a liquid with a straw.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The air pressure in the balloon is due to the air filled in it, striking the walls of the balloon.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The air in the balloon exerts pressure on the walls of the balloon. This is accordance with the kinetic molecular theory of gases which state that the pressure exerted by the gas is equal to the pressure applied by the gas molecule on the walls of container.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

When the atmospheric pressure of the earth falls suddenly then __________.

  1. there is a clear weather

  2. there may be a slow wind

  3. there may be storms and strong winds

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Atmospheric pressure acts as an indicator of weather conditions. Sudden decrease in atmospheric pressure of the earth shows that there may be storms and strong winds. Sometimes it can cause rain also. 

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

If the air pressure of an area decreases suddenly then our blood vessels swells up and sometimes bursts.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the air pressure of an area suddenly decreases, then in the human body the blood vessels swell up or sometimes bursts. This activity is commonly seen in mountaineers.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Unit measure of atmospheric pressure is equal to the column of mercury pressure of _____.

  1. 76 cm

  2. 76 mm

  3. 1.013 mm

  4. 10.13 mm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The unit measure of atmospheric pressure is equal to the column of mercury pressure of 76 cm or 760 mm of mercury.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Liquids exert equal pressure on the wall of container at equal depth.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Liquids exert equal pressure on the wall of the container at equal depth. This is because the density of the liquid at the same depth will be same.

Multiple choice chemistry the particle theory atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Cycle tube when filled with an air, it swells up because of the pressure exerted by the particles of the air in the tube.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cycle tube when filled with the air it swells up because of the pressure exerted by the particles of the air present in the tube. The particles of air collide with each other and exert pressure on the walls of the tube.