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

Which is an example of moving from a liquid to a solid?

  1. Water freezing into an ice cube

  2. A glass of water by a window

  3. A popcicle melting in the sun

  4. A pot of water on the stove
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Freezing is the phase change from liquid to solid. When water loses enough heat, its particles slow down and lock into a fixed, rigid structure.

Multiple choice

Which is a solid?

  1. Desk

  2. Helium

  3. Syrup

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

A solid has a definite shape and volume. A desk is a solid, whereas helium is a gas, and syrup and mud puddles are liquids.

Multiple choice

Which is a liquid?

  1. Steam

  2. Lemonade

  3. Water Vapor

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

A liquid has a definite volume but takes the shape of its container. Lemonade is a liquid, while steam and water vapor are gases, and an ice cube is a solid.

Multiple choice

Which states of matter take the shape of its container?

  1. Solid and Liquid

  2. Solid and Gas

  3. Liquid and Gas

  4. Solid, Liquid and Gas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Liquids and gases are fluids; they do not have a fixed shape and will flow to take the shape of the container they are in. Solids maintain their own shape.

Multiple choice

Which answer shows examples of chemical changes?

  1. cutting vegetables, mowing the lawn, freezing water

  2. building a fire, making toast, breaking a pencil

  3. fireworks, baking a cake, digesting food

  4. cutting your hair, burning paper, melting ice cream
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chemical changes result in the formation of new substances. Fireworks, baking a cake, and digesting food all involve chemical reactions that create new chemical products.

Multiple choice

Which answer shows only examples of physical changes?

  1. cutting your hair, burning paper, melting ice cream

  2. fireworks, baking a cake, digesting food

  3. building a fire, making toast, breaking a pencil

  4. cutting vegetables, mowing the lawn, freezing water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Physical changes do not change the chemical identity of the substance. Cutting vegetables, mowing the lawn, and freezing water are all physical changes because the material remains the same.

Multiple choice

If you freeze water its weight will change.

  1. True

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

According to the law of conservation of mass, the mass of a substance remains constant during a phase change. Freezing water does not change the amount of matter present.