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 evs sources of water water resources and conservation receding water table water conservation and irrigation

Choose the correct answers from the alternatives given .
Which of the following is not a property of water that helps explain why water is so important to life on earth?

  1. Water expands when frozen

  2. Nonpolar compounds dissolve- well in water

  3. Water can absorb great quantities of heat with relatively-small increase in its temperature

  4. Water molecules attract each other
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is a polar solvent. Therefore, nonpolar compounds do not dissolve well in water. This is a property of water, but it is not a property that explains why water is important to life; rather, it is a limitation.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

A liquid cannot be compressed because it has a fixed volume.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1) A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.

2) When you compress liquid together, the molecular forces  become very strong stopping it from being compressed very much.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Hydrogen was collected in one case over water, and in another over mercury in the same conditions. In both cases, the volume of the gas was the same.
Amounts of hydrogen collected over?

  1. Both liquids were identical

  2. The water was greater

  3. The mercury was greater

  4. Noting can be predicted from the given data
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When gas is collected over water, it is saturated with water vapor (Dalton's Law). The total pressure is the sum of gas pressure and water vapor pressure. Over mercury, there is negligible vapor pressure. For the same volume and total pressure, the dry gas amount must be higher in the mercury case.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Which liquid has maximum surface tension?

  1. Water

  2. Alcohol

  3. Ammonia

  4. Glycerol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Tension of the surface film of a liquid caused by attraction of the particles in the surface layer by the bulk of the liquid which minimize surface area.
$\bullet $  Water $=72.86$ $nN/m$
$\bullet$  Ethanol (Alcohol) $=22.10$ $nN/m$
$\bullet$  Glycerol $=64.00$ $nN/m$
Ans :- Option A
Multiple choice chemistry materials liquid crystals liquid state the liquid state

With increase in temperature, the fluidity of liquids 

  1. increases

  2. decreases

  3. remains constant

  4. may increase or decrease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fluidity is the inverse of viscosity. As temperature increases, the kinetic energy of liquid molecules increases, overcoming intermolecular forces and reducing viscosity, which in turn increases fluidity.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

The boiling point of a liquid with the increase of pressure,  ______________.

  1. decreases

  2. increases

  3. remains constant

  4. changes according to the weather
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Since a liquid vaporises when molecules moves faster and farther apart but while increasing pressure, we apply an external force to hold molecules closer to each other. Hence, molecules will require more energy to overcome this resistance thus this increases boiling point of liquid. Hence, the boiling point of a liquid with the increase of pressure, increases.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Which tool allows liquids to be swirled with a low risk of spilling?

  1. Crucible

  2. Evaporating dish

  3. Tonds

  4. Erlenmeyer flask

  5. Mortar and pestle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Erlenmeyer flask $\rightarrow$ 

It is used as a container for liquids. Its Shape makes it easy and safe to swirl liquids without spilling, making them ideal for titration. It cannot be used to measure the volume of liquid because its shape makes it difficult to make accurate readings.
Hence the required answer is (C) Erlenmeyer flask.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

With increase in temperature, viscosity and surface tension of a liquid respectively:

  1. Decrease, decrease

  2. Increase, increase

  3. Increase, decrease

  4. Decrease, increase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Temperature is increased.
1) As the temperature of a liquid increases,the movement of its molecule increases,which disturbs the imbalanced forces on the surface of liquid.thus the barrier of tightly bound molecules weakens thereby,Surface tension decreases.
2) As the temperature of a liquid increases,the energy of its molecules increases which increases the movement of molecules.so the liquid becomes more fluid.thus viscosity of liquid decreases.
Multiple choice chemistry materials liquid crystals liquid state the liquid state

Which of the following increases with the increase in temperature in case of liquid?

  1. Surface tension

  2. Vapour pressure

  3. Viscosity

  4. Boiling point
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Vapour pressure increases with increase in temperature. Because, in a closed container solution contains, higher the temperature high will be the evaporation then the pressure created due to vapor i.e vapor pressure increases.
Ans :- Option B.
Multiple choice chemistry materials liquid crystals liquid state the liquid state

When a student was given aviscometer, the liquid was sucked with difficulty, the liquid may be:

  1. benzene

  2. toluene

  3. water

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

Among the given liquid glycerine is a viscous liquid and hence it was sucked with difficulty.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

How many of the following properties are shown by liquid  state?
Rigidity, Definite volume. No free surface, Define shape

  1. $1$
  2. $2$
  3. $3$
  4. $4$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The properties of liquids are as follows:

  • It does not have a fixed shape but it has a fixed volume.
  • It does not have definite shape.
  • It has a free surface.
  • It does not show rigidity.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

The temperature remains constant during melting and all the ice changes into water. The enthalpy change associated with this process is due to _____________.

  1. latent heat of fusion

  2. latent heat of vaporisation

  3. latent heat of evaporation

  4. latent heat of sublimation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Latent heat is the energy released or absorbed by a body during a constant temperature process. An example is a phase transition such as ice melting or water boiling. Heat absorbed during melting is called latent heat fusion.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Can water be made to boil in a paper cup without the paper being burnt. This is because ___________.

  1. temperature of water does not change during boiling.

  2. ignition temperature of paper is higher than the boiling point of water

  3. high latent heat of vaporization of water

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

The paper cup in which water is placed is having ignition temperature higher than the  boiling point of water, and water have high latent heat of vaporization. This is also possible that temperature provided to water does not exceed its boiling point. Hence, water can boil in paper cup without burning the cup.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Why does temperature remain constant as a liquid is heated and gets converted to its gaseous state at its boiling point? 

  1. Due to increase in potential energy

  2. Due to increase in kinetic energy

  3. Due to decrease in potential energy

  4. Due to decrease in kinetic energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As a liquid is heated at constant pressure, its temperature increases. This trend continues until the boiling point of the liquid is reached. No further rise in temperature of the liquid can be induced by heating due to increase in kinetic energy.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Which one of the following is a correct statement?
1. Ice provides more cooling effect than water at $273\ K$.
2. Evaporation of a liquid causes cooling.
3. Increase of pressure lowers the separation between the particles of matter.

  1. $1$ and $2$
  2. $1$ and $3$
  3. $2$ and $3$
  4. $1, 2$ and $3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ice provides more cooling effect than water at 273 K because of latent heat of fusion. Evaporation of a liquid causes cooling as the surface molecules take away heat to escape out. Increase of pressure lowers the separation between the particles of matter and brings them closer leading to change of state from gas to liquid and to solid.