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

The critical temperature is the maximum temperature at which substance can remain as

  1. Solids

  2. Liquids

  3. Gases

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

Liquids are formed when the energy (usually in the form of heat) of a system is increased and the rigid structure of the solid state is broken down. In liquids, molecules can move past one another and bump into other molecules; however, they remain relatively close to each other like solids.The highest temperature at which a substance can exist as a liquid is called its critical temperature.

Multiple choice

Which of the following turns lime water milky?

  1. CO2 gas

  2. O2 gas

  3. Distilled water

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

Lime water is a saturated solution of calcium hydroxide Ca(OH)2 produced by mixing hydrated lime with water.It turns milky by CO2  gas 

Multiple choice

CFCs are not used as ___________.

  1. coolants

  2. sterilants

  3. solvents

  4. filling in balloons
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CFCs are not used for filling balloons.The most common gas used to fill a balloon is helium, which will make it float.

Multiple choice

When cream is separated from milk

  1. the density of milk decreases

  2. the density of milk increases

  3. the density of milk remains unchanged

  4. it becomes more viscous
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice

Milk is an example of

  1. suspension

  2. gel

  3. colloid

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

Milk is a colloid because it consists of microscopic fat globules dispersed in a water-based liquid, and these particles do not settle out over time.

Multiple choice

Milky water of green coconut is

  1. liquid nucellus

  2. liquid of female gametophyte

  3. liquid endosperm

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

The liquid inside a green coconut is known as liquid endosperm, which contains free nuclear endosperm.

Multiple choice

What portion of your body is water?

  1. 1/5

  2. 3/5

  3. 2/5

  4. 4/5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The human body is composed of approximately 60% water, which is equivalent to 3/5 of the total body mass. This water is essential for various physiological processes and cellular functions.

Multiple choice

What is chemical change?

  1. Chopping onions

  2. Exploding a fire cracker

  3. Melting of ice

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

Physical property: chopping and melting and boiling point is associated with a phase change. It describes an inherent characteristic of alcohol and ice. Chemical change involves a chemical reaction. At least one new substance is formed.

Multiple choice

Water that has changed into gas is called _____.

  1. ice

  2. water vapour

  3. matter

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

Water vapour is the gaseous state of water. Ice is the solid state, while matter and substance are general terms for physical materials.

Multiple choice

An emulsion is formed when ____________.

  1. A gas is dispersed in a liquid

  2. A gas is dispersed in a solid

  3. A liquid is dispersed in a gas

  4. A liquid is dispersed in the liquid

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because emulsion is colloidal dispersion in which both dispersed phase and dispersion medium are liquid.

Multiple choice

_______ liquid is known as Black Gold.

  1. Petroleum

  2. Mercury

  3. Petrol

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

Petroleum is commonly referred to as Black Gold due to its immense economic value and dark, viscous appearance. It serves as the primary source for many fuels and chemicals.