Tag: changes in physical state - boiling, evaporation and condensation

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Questions Related to changes in physical state - boiling, evaporation and condensation

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.

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

Which of the following is not the unit of atmosperhic pressure?

  1. $Pascal$
  2. $N/m^2$
  3. $N/m$
  4. $76\ cm\ of\ Hg$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The unit of the pressure is $pascal$. $N/m^2$, and $76\ cm\ of\ Hg$.

Here $N/m$ is the unit of the surface tension. 
Thus option C is the correct answer.

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

The atmospheric pressure remains unchanged throughout the earth's atmosphere.

  1. True

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

The atmospheric pressure changes throughout the atmosphere.
Example: As we go up in the air, the atmospheric decreases as the density of the air decreases. 

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

Usually the atmospheric pressure is equal to ___________.

  1. $1.013\times 10^{5}$ Pascal
  2. $1.013\times10^{5}N/m^2$
  3. $101.3\ kPa$

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

The atmospheric pressure can be given as $1.013\times 10^{5}\ pascals$ or $1.013\times10^{5}\ N/m^2$.

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

Pressure can be measured by using Mercuric as well as Aneroid barometer.

  1. True

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

In 1643 Torricelli made an instrument for measuring atmospheric pressure. This device is called a barometer. This barometer can be either mercuric or aneroid barometer. 

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

In human body, the pressure exerted by the cells is ________ the atmospheric pressure.

  1. equal to

  2. more than

  3. slightly greater than

  4. greater than
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the human body, the pressure exerted by the cells in our body is equal to the atmospheric pressure. Hence we do not get shrunk.