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

What is chemiclave?

  1. Chemical vapour sterilization

  2. Submerging the instruments for 4 hours in chemicals

  3. Boiling for 2 hours in water and then submerging for 2 hours in chemicals

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

Chemiclave is a machine which sterilizes instruments with high pressure, high temperature water and some chemicals like alcohol and formaldehyde vapour. It is therefore a sterilization unit that uses chemicals under pressure.

Multiple choice

We have distilled water in two plastic bottles labelled A and B. We add hydrochloric acid to the water in bottle A and caustic soda to the water in bottle B. Which of the following will hold true?

  1. The solutions in both the bottles will conduct electricity.

  2. Only the solution in bottle A will conduct electricity.

  3. Only the solution in bottle B will conduct electricity.

  4. The solutions in both the bottles will not conduct electricity.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The solution in bottle A is acidic and the solution in bottle B is basic. Both acids and bases dissociate into ions in water. So, both the solutions conduct electricity when an electric current is passed through them.

Multiple choice

What are nanofluids?

  1. Fluids which are filled in nanosize devices

  2. Mixture of different fluids in nano quantities

  3. Fluids with suspensions of solid nano-particles

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

Nanofluids are engineered colloidal suspensions of nanoparticles in a base fluid. The nanoparticles used in nanofluids are typically made of metals, oxides, carbides or carbon nanotubes.

Multiple choice

What happens when water freezes?

  1. Its size increases.

  2. Its size decreases.

  3. Its weight increases.

  4. Its weight decreases.

  5. Its size remains the same as it was before freezing.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When water freezes, its size (volume) increases. This is one of the reasons for the bursting of water pipeline in winter because when water freezes, it converts into ice and increases in size. Water is one of the few substances that expand on cooling.

Multiple choice

Which of the following statements is correct?

  1. All living things do not need water.

  2. All non-living things need water.

  3. We cannot survive without water.

  4. Water is not important on earth.

  5. Ice and snow are liquid forms of water.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

We cannot survive without water because water is very important component of our life. Living things need water to grow and survive. They cannot survive without water for very long. All kind of processes, like growth, metabolism of food depend on water.

Multiple choice

Which of the following statements is correct?

  1. All living things do not need water.

  2. All non living things need water.

  3. We cannot survive without water.

  4. Water is not important on earth.

  5. Ice and snow is liquid form of water.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

We cannot survive without water because water is very important component of our life.Living things need water to grow and survive. They can not survive without water for very long. Water is essential for all living things.All kind of processes like growing, food,metabolism of food depends on the water.

Multiple choice

Which of the following statements is correct?

  1. When we heat water, there is no change.

  2. When we heat water, it bubbles and boils.

  3. When we heat water, it changes its colour.

  4. When we heat water, it freezes.

  5. When we heat water its shape changes.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is right option because when we heat water it reaches to its boiling point and starts boiling and making bubbles.

Multiple choice

Which of the following statements is correct?

  1. All water is fit to drink.

  2. We must not filter water before we drink.

  3. We must boil and filter water before drinking.

  4. Sea water is drinkable.

  5. We can survive without water.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This statement is correct. We should filter or boil water before drinking as it contains lots of bacteria, viruses and dust particles that are harmful for our body.

Multiple choice

Which of the following options is a chemical change?

  1. Preparation of lemonade

  2. Preparation of cheese

  3. Dilution of alcohol

  4. Cutting of paper
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chemical change is any change that results in the formation of a new chemical substance. It involves making and breaking the bonds between atoms. It cannot be reversed.

Multiple choice

Diffusion is very fast in

  1. solids

  2. liquids

  3. gases

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

In liquids, there is less space to move, so collisions are more frequent between the molecules causing a slower diffusion rate. The opposite happens in gases. There is more space in gases. As a result, there are less collisions between the molecules causing a faster diffusion rate. Other factors that may have an effect on diffusion rates are temperature, mass of the molecule, volume/surface area and the medium used.

Multiple choice

The state of matter with only one free surface is

  1. liquid

  2. gas

  3. solid

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

A liquid is a nearly incompressible fluid that conforms to the shape of its container, but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume, but no fixed shape.