Chemistry · Science General

States of Matter

2,382 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 look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which of the following is not a mixture but a compound?

  1. Soda water

  2. Sea water

  3. Soil

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

All the above examples are mixtures and not compounds. Mixtures are impure substance made up of two or more pure substances. They are not chemically mixed and can be separated by physical means.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which of the following do not show the properties of the constituents?

  1. Water

  2. Air

  3. Sugar solution

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

Water is a compound having hydrogen and oxygen atoms in the ratio of 2:1 and properties of water as chemical compound is different from the hydrogen and oxygen elements.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Water is a  _______ made up of hydrogen and oxygen combined in the ratio ______ by volume or _______ by mass.

  1. compound, 3:2, 1:1 respectively

  2. element, 1:2, 3:1 respectively

  3. compound, 2:1, 1:8 respectively

  4. molecule, 1:1, 1:16 respectively
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is a chemical compound made up of hydrogen and oxygen combined in the ratio $2:1$ by volume or $1:8$ by mass (2 g of hydrogen combines with 16 g of oxygen).

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Statement: A homogeneous mixture of solute and solvent is known as solution.


State whether the given statement is true or false.

  1. True

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

Solutions are homogeneous mixtures containing two or more substances called the solute and solvent.

The solute is the substance that dissolves.

The solvent is the dissolving medium. When looking at a solution it is impossible to distinguish the solute from the solvent. 

Hence, the given statement is $\text{true}$.

Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

The process in which water vapour changes to liquid is called

  1. Condensation

  2. Evaporation

  3. Transpiration

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

Sun derives the water cycle, heats up water in ocean and seas, and then water vapours evaporate to air. As the vapours move upward the cool temperature there causes it to condense into clouds and they fall as precipitate like rain, hailstone etc.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Changing of liquid into vapours without heating is called:

  1. freezing

  2. steaming

  3. evaporation

  4. none of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Changing of liquid into vapours is called evaporation and it causes cooling.
And in freezing the liquid changes into solid and causes cooling.
And in steaming the liquid boils and changes in vapour but causes heating
Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

The process of changing water vapour into water is called:

  1. boiling

  2. evaporation

  3. melting

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

The process of changing water vapour into water is called condensation.

Condensation is simply the process of change of the vapour from gaseous state to liquid when comes in contact of cool surface.
And this process can't be boiling as in boiling we have to provide heat and it is the change of liquid state into vapour form.
And the process is not evaporation as it also changes water into vapour.
Melting is not the required process as it is the change of state from solid to liquid.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Evaporation causes:

  1. cooling

  2. heating effect

  3. an increase in weight

  4. an increase in density
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation causes cooling.

Because in evaporation the water changes form liquid to vapour state so the vapour of water causes the surface to becomes cool.
Evaporation causes cooling because during evaporation the particle of the liqued absord energy from the surroundings to regain the energy lost during evaporation. the absorbtion of heat from the surrounding makes the surrounding  cool.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Which of the following is an example of evaporation?

  1. Drying of hair

  2. Preparation of common salt from sea water

  3. Dew in the morning

  4. Cooling of hot tea
Reveal answer Fill a bubble to check yourself
A,B,D Correct answer
Explanation
Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.
Drying of leads to water loss in hair or water evapouration leads to water evapouration.
Producing of salt also leads of water evaporation from salted water.
Cooling of hot tea leads to water codensation not evaporation.
Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

In which of the following processes evaporation involves

  1. Hot tea gets cool over time

  2. Preparation of common salt from sea water

  3. Wet clothes dry in sun

  4. A,B,C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is the process of a liquid converts into gaseous phase. In all these process liquid moles are evaporated into gaseous phase. Hence, option D is correct.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Drying clothes is an example of :

  1. condensation

  2. evaporation

  3. hydration

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

Drying clothes is an example of evaporation as in evaporation water evaporates by the heat of the sun thus helping in drying of clothes .

And hydration means the process of absorbing water .
And condensation means water that collects as droplets on a cold surface when humid air is in contact with it.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

Evaporation is the process of a substance in:

  1. liquid form transitioning into the gas phase

  2. solid form transitioning into the gas phase

  3. liquid form transitioning into the solid phase

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

Evaporation of the substance is the process in which the substance transition from liquid phase to gas phase. Condensation is the process in which gas returns to liquid form. Hence, options A is correct.