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 chemistry materials liquid crystals liquid state the liquid state

What is the shape of the meniscus observed when water and mercury are taken in two different capillary tubes?

  1. Concave and convex

  2. Convex and concave

  3. Both concave

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

The shape of the meniscus observed when water and mercury are taken in two different capillary tubes is concave and convex respectively.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

The amount of energy required to change $1\ kg$ of a solid into liquid at atmospheric pressure at its melting point is known as _______________.

  1. latent heat of fusion

  2. latent heat of boiling

  3. latent heat of freezing

  4. melting energy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The amount of energy required to change $1\ kg$ of a solid into liquid at atmospheric pressure at its melting point is known as latent heat of fusion.

Hence option A is correct.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

An experiment is conducted where droplets of liquid are placed on the surface of a penny. Which of the following substances would you expect to the able to place the maximum number of drops of on the surface of the penny?

  1. $HF$
  2. $H _{2}O$
  3. $CH _{3}CH _{2}CHO$
  4. $CCl _{4}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fluorine is most electronegative element so it forms stronger hydrogen bond which is the reason of stronger surface tension.So HF drops place maximum on the penny.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

What happens to the rate of evaporation of water, if the atmospheric pressure is decreased during the extraction of colored components?

  1. Increases

  2. Decreases

  3. Do not change

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

The rate of evaporation of water increases, if the atmospheric pressure is decreased during the extraction of colored components because atmospheric pressure is inversely proportional to evaporation. 

Multiple choice chemistry materials liquid crystals liquid state the liquid state

What happens to the rate of evaporation of water, if the atmospheric pressure is increased during the extraction of the colored component from liquid? 

  1. Increases

  2. Decreases

  3. Do not change

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is a surface phenomenon in which surface molecules of solution moves to the atmosphere.If atmospheric pressure is increased then due to external pressure molecules on the surface will not move to the atmosphere so if atmospheric pressure increases, a rate of evaporation decreases.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Metallic liquids contain:

  1. metal atoms

  2. ions and mobile electrons

  3. aggregates of metal atom

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

When metals are in liquids, they dissociate into ions and give away electrons. So, metallic liquids contain ions and mobile electrons.

Ex: $Na _{(s)}\longrightarrow Na^+ _{(ag)}+e^-$
Ex: $Mg _{(s)}\longrightarrow Mg^{+2} _{(ag)}+2e^-$

Multiple choice chemistry materials liquid crystals liquid state the liquid state

When a solid crystal is melted, it should become a liquid. Liquid crystals are an intermediate stage between a liquid and a crystal. Which of the following is a liquid crystal of a non-living system?

  1. Cholesteryl bromide

  2. Axons of nerve

  3. Striated muscle fibre

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

Axons of nerve, striated muscle fibre, cilia all belong to bio-logical living systems.

Cholesteryl bromide $(C _{27}H _{45}Br)$ is a liquid crystal of a non-living system.

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

Arrange the density of three types of matter in decreasing order.

  1. gas, liquid, solid

  2. liquid, solid, gas

  3. liquid, gas, solid

  4. solid, gas, liquid

  5. solid, liquid, gas
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Density means how much dense or rigid the particles in a matter are. 


A solid is denser than the liquid and a liquid is denser than the gas.


Thus the decreasing order of density should be solid, liquid, gas. 


Hence, the correct option is E.