Chemistry · Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which of the following would you use to keep a dehydrated substance from rehydrating?

  1. Mortar and Pestle

  2. Beaker

  3. Evaporating dish

  4. Crucible

  5. Desiccator
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Desiccator is used to keep a dehydrated substance from rehydrating.
In desiccator, anhydrous calcium chloride or other suitable dehydrating agent is kept that will remove moisture from atmosphere. Thus, it provides dry atmosphere.

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

Change of a liquid into vapors at any temperature below its boiling point is called as ______________.

  1. solidification

  2. gasification

  3. evaporation

  4. liquifaction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour. This phenomenon of change of a liquid into vapours at any temperature below its boiling point is called 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

Evaporation is a type of vaporization of a liquid that occurs from _________.

  1. bottom of a solid

  2. bottom of a liquid

  3. surface of a gas

  4. surface of a liquid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance. Evaporation occurs only at the surface of a liquid.

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

When liquid takes up heat from the surrounding, the surrounding ____________.

  1. cools down

  2. heats up

  3. remains unchanges

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

Liquid requires latent heat of vaporization. So, when the liquid takes up the heat from the surrounding to vaporize, the temperature of surrounding reduces, and it cools down due to loss of heat.

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 that occurs directly from the solid phase below the melting point is called as:

  1. sublimation

  2. solid evaporation

  3. gasification

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

Evaporation that occurs directly from the solid phase below the melting point, as commonly observed with ice at or below freezing or moth crystals (napthalene or paradichlorobenzene), is called sublimation.

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

A volatile liquid _____________.

  1. vaporizes quickly at room temperature

  2. solidifies quickly at room temperature

  3. liquifies quickly at room temperature

  4. does not vaporize quickly
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A volatile liquid is one that evaporates or vaporizes quickly at room temperature. Volatile liquids have low boiling point. As a result, they evaporate very easily at room temperature.

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

The process by which molecules undergo a spontaneous transition from the liquid phase to the gaseous phase is called as:

  1. boiling

  2. sublimation

  3. evaporation

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

The process by which molecules undergoes a spontaneous transition from the liquid phase to the gaseous phase is called as evaporation. In evaporation due to increase of temperature rate of evaporation also increases.

Condensation is the reverse of evaporation in which water vapor converts into liquid water by decreasing temperature.  

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

 Liquid which evaporates more quickly is ___________.

  1. spirit

  2. water

  3. grease

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

Spirit is a volatile liquid which evaporates fastly than water and oil which have higher boiling point as compare to spirit. Grease is heavy, viscous oily material takes longer time to evaporate. Hence, spirit is the liquid which evaporates fastly. 

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

Evaporative cooling is the phenomenon  _____________.

  1. in which molecule of liquid with high kinetic energy evaporates fastly, leaving behind the particle of less kinetic energy

  2. in which molecule of liquid with low kinetic energy evaporates fastly, leaving behind the particle of high kinetic energy

  3. temperature change of the liquids

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

Evaporation is the surface phenomenon in which liquid molecules of high kinetic energy evaporates fastly from the surface of the liquid. Due to which the molecules of less kinetic energy remains in the solution and the temperature of the liquid decreases. Hence, it cools down. This phenomenon is known as evaporative cooling.

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

During evaporation of liquid,  ___________.

  1. the temperature of the liquid falls

  2. the temperature of the liquid rises

  3. the temperature of the liquid remains unchanged

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

When liquid gets evaporated from the surface of liquid they convert from liquid state to gaseous state by absorbing energy from the liquid and due to it temperature of the liquid decreases.

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

Which of the following statements is/are wrong?

  1. At room temperature, evaporation of water is rapid as compared to ethanol

  2. Water is more viscous as compared to ethanol

  3. Liquid drops are spherical in shape

  4. Clothes are easily dried on dry days as compared to humid days
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

Clothes are easily dried on dry days as compared to humid days because evaporation is inversely proportional to humidity.

Ethanol evaporates faster because the intermolecular forces are strong in water due to hydrogen bonding.
Water is more viscous compared to ethanol due to its cohesivity adhesivity.

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 substance that evaporates at room temperature.

  1. Water

  2. Oil

  3. Kerosene

  4. Ammonium chloride
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kerosene evaporates at room temperature (liquid to gas) as it is volatile and have a low vapour pressure.


Water and oil need heat for evaporation (liquid to gas). 

Hence, option C is correct.