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 particles of a gas ideal gases physics

Heating a liquid expands it because

  1. Molecules gain potential energy and due to it, motion of molecules is increased

  2. Molecules gain kinetic energy and due to it, motion of molecules is increased

  3. Molecules gain kinetic energy and due to it, motion of molecules is reduced

  4. Molecules gain potential energy and due to it, motion of molecules is reduced
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As a liquid is heated, its molecules gain kinetic energy, motion of molecules is increased and the liquid expands.Overall interparticle distance increases.

Multiple choice particles of a gas ideal gases physics

Due to motion of molecules in a substance

  1. Smell of perfume spreads around the room

  2. Perfume bottle spreads around the room

  3. Perfume cools the room

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

When perfume is sprayed in corner of a room, its molecules moves around the room due to diffusion spreading the fragrance. Overall a diffusion process is seen in it as perfume particles diffuse into air particles.

Multiple choice chemistry chemical equilibrium equilibrium in physical processes introduction to equilibrium chemical equilibrium and acids-bases

In a closed container rates of evaporation and condensation are same. What this statement indicate?

  1. A general rule for predicting solubility

  2. Conversion of solid phase to the liquid phase

  3. It represents relationship between absolute temperature and the kinetic energy of particles

  4. It represents relationship between volume and temperature at constant pressure

  5. A state in which the liquid and gas phases are in equilibrium
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Evaporation is the process of conversion from a liquid state to gaseous state.

Condensation is the process of conversion from the gaseous state to a liquid state. If a rate of the evaporation rate of condensation 
$\Rightarrow \quad $ Liquid & gas phases are in equilibrium.
This is the condition for physical equilibrium.

Multiple choice chemistry chemical equilibrium equilibrium in physical processes introduction to equilibrium chemical equilibrium and acids-bases

What is not something that a phase equilibrium line shows?

  1. The equilibrium point between solid and liquid

  2. The equilibrium point between liquid and gas

  3. The equilibrium point between liquid and solid

  4. The equilibrium point between solid and gas

  5. The equilibrium point between gas and vapor
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The phase equilibrium line does not show the equilibrium point between gas and vapor.
Because the gas and vapor belongs to the same phase.


The correct option is $E$.

Multiple choice chemistry chemical equilibrium equilibrium in physical processes introduction to equilibrium chemical equilibrium and acids-bases

Which of the following represent physical equlibrium?

  1. Dissolution of solid $KI$ in water
  2. Sublimation of $NH _4Cl$

  3. Evaporation of dry ice in a closed container

  4. Condesation of water vapours
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Physical equilibrium involves a physical process where the rate of the forward process equals the rate of the reverse process. Dissolution of a solid in a saturated solution is a classic example of physical equilibrium.

Multiple choice social science water a precious resource water resources and conservation receding water table water conservation and irrigation

Water contains impurities during

  1. Evapo-transpiration

  2. Condensation

  3. Transpiration

  4. Filtration
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Condensation is the process where water vapor turns into liquid water. As water vapor condenses into droplets in the atmosphere, it often collects dust and other atmospheric particles, resulting in impurities.

Multiple choice chemistry water: a natural resource water resources and conservation receding water table water conservation and irrigation

When rainwater percolates into the cracks of RCC, it further gets weakened due to the:

  1. formation of $H _2CO _3$

  2. increase in pH value

  3. increase in the percentage of free lime

  4. exothermic hydration process
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Formation of $H _{2}CO _{3}$:

RCC contains $CaCO _{3}$ which when reacted with water forms carbonic acid which therefore gets weakened.
$CaCO _{3} + H _{2}O \rightarrow CaO + H _{2}CO _{3}$

Hence, the co0rrect option is $(A)$.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

A compound is always ______ whereas a mixture is :

  1. Heterogenous, both heterogenous and homogenous

  2. Homogenous, heterogenous

  3. Homogenous, Both homogenous and heterogenous

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

Compound is made up of two or more pure substances which are always homogenous. Mixtures contains two or more pure substances physically combined which may be homogenous or heterogenous

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following obey the law of constant proportions in their formation?

  1. Mixtures

  2. Compounds

  3. Elements

  4. Colloids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A compound always follow the law of constant proportions because in a compound the elements that are present are always in the constant ratio.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

_____is chemically mixed whereas____is physically combined.

  1. Element, compound

  2. Compound, mixture

  3. Mixture, compound

  4. Mixture, element
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Compound is made up of two or more elements that are chemically combined whereas mixtures are made up of two or more pure substances that are physically combined. 

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following is not a property of mixtures?

  1. Components of mixtures are present in a varying proportions

  2. They are always homogeneous

  3. The components of mixtures retain their original properties

  4. The components of mixtures can be separated by physical means
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mixtures can be homogeneous or heterogeneous. Oil and Water is a heterogeneous mixture.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Each component of a ______ retains its individual properties.

  1. Compound

  2. Element

  3. Mixture

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

Matter that consists of two or more substances which may be elements, compounds or both mixed together physically in any proportion, but not chemically combined is called as a mixture. Each component of a mixture retains its individual properties. 

For example, we could mix various proportions of hydrogen and oxygen gas, as long as you do not ignite the mixture, the combination will form a mixture that can be separated.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following is not a property of mixture?

  1. Does not have a sharp melting or boiling point

  2. Heat is taken in or given out in the preparation

  3. Can be separated by physical means

  4. May be homogeneous or heterogeneous
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The parts of a mixture can be separated by physical means. A mixture does not have a sharp melting or boiling point. It may be homogeneous or heterogeneous. Energy is neither given out nor absorbed in the preparation of a mixture. However, heat is taken in or given out in the preparation of a compound.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following statement is incorrect?

  1. In compounds components are present in definite proportion whereas in mixtures components are present in varying proportion

  2. Compounds are homogenous whereas mixtures are mostly heterogeneous

  3. Particles in a compound are generally of same kind whereas in mixtures they are of different kind

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

All the compounds are made up of different elements and have properties different from their constituent element.

Mixture composed of variant proportion of components.
Hence, all statements are correct.