Chemistry ยท 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 of the following is an example of a chemical property?

  1. Color

  2. Density

  3. Solubility

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

Boiling point is a chemical property because it depends on the intermolecular forces between molecules and their tendency to vaporize.

Multiple choice

What is the name of the process in which a solid substance changes directly into a gas without passing through the liquid phase?

  1. Sublimation

  2. Deposition

  3. Melting

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

Sublimation is the process in which a solid substance changes directly into a gas without passing through the liquid phase.

Multiple choice

What is the name of the process in which a substance absorbs energy and changes from a liquid to a gas?

  1. Evaporation

  2. Condensation

  3. Freezing

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

Evaporation is the process in which a substance absorbs energy and changes from a liquid to a gas.

Multiple choice

What is the name of the process in which a substance changes from a gas to a liquid?

  1. Condensation

  2. Evaporation

  3. Freezing

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

Condensation is the process in which a substance changes from a gas to a liquid.

Multiple choice

What is the name of the process in which a substance changes from a liquid to a solid?

  1. Freezing

  2. Melting

  3. Evaporation

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

Freezing is the process in which a substance changes from a liquid to a solid.

Multiple choice

Which of the following is an example of a compound?

  1. Water

  2. Oxygen

  3. Sodium

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

Water is a compound because it is made up of two different elements (hydrogen and oxygen) that are chemically combined.

Multiple choice

What is the name of the process in which a substance changes from a solid to a liquid?

  1. Melting

  2. Freezing

  3. Evaporation

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

Melting is the process in which a substance changes from a solid to a liquid.

Multiple choice

Which of the following is an example of a mixture?

  1. Salt water

  2. Carbon dioxide

  3. Gold

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

Salt water is a mixture because it is made up of two different substances (salt and water) that are not chemically combined.

Multiple choice

What is the phenomenon in which a material exhibits a sudden change in its thermal properties at a specific temperature?

  1. Phase transition

  2. Melting point

  3. Boiling point

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

Phase transition is the phenomenon in which a material exhibits a sudden change in its thermal properties at a specific temperature.

Multiple choice

What is the process of removing salt from seawater by freezing and then melting the ice?

  1. Distillation

  2. Reverse osmosis

  3. Freezing

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

Freezing is a process of desalination of seawater by freezing and then melting the ice.

Multiple choice

Which of the following is an example of a green solvent?

  1. Water

  2. Methanol

  3. Dichloromethane

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

Water is a green solvent due to its low toxicity, abundance, and ability to dissolve a wide range of substances.

Multiple choice

Which of the following is an example of a green solvent?

  1. Ionic liquids

  2. Supercritical fluids

  3. Deep eutectic solvents

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

Ionic liquids, supercritical fluids, and deep eutectic solvents are all examples of green solvents that have low toxicity, are non-flammable, and can be easily recycled.

Multiple choice

What was the primary component of the emulsion used in the Dry Plate Process?

  1. Silver bromide

  2. Silver iodide

  3. Silver chloride

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

The emulsion used in the Dry Plate Process primarily consisted of silver bromide, which was sensitive to light and formed the basis of the photographic image.

Multiple choice

Which of the following is a physical property of matter?

  1. Mass

  2. Color

  3. Temperature

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

Color is a physical property of matter because it can be observed without changing the composition of the substance.

Multiple choice

Which of the following is a mixture?

  1. Salt water

  2. Gold

  3. Oxygen

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

Salt water is a mixture because it is composed of two or more substances that are not chemically combined.