Chemistry · Science General

States of Matter

2,382 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

Varun took a cup of water and dissolves two spoons of salt in it. Later he placed the salty water under the sunlight for three days. He found only crystals of salt but no water remaining in the cup. Which of the following processes is being demostrated in the above experiment ?

  1. Filteration

  2. Boiling

  3. Condensation

  4. Evaporation

  5. Decantation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is the process when the sun heats up water in river or lakes or the ocean and turns it in to vapour or steam. The water vapour or steam leaves the river, lake or ocean and goes in to the air. In the above experiment the water in the salty solution evapoated in  the air and only the crystals of salt left.

Multiple choice

Shreya took two cups, one containing warm water and the other one cold water. She put a spoon of sugar in to each cup and stirred the mixture properly. What will be her observation while doing this experiment?

  1. Sugar is insoluble in cold water.

  2. Sugar dissolve quickly in cold water.

  3. Sugar dissolve quickly in warm water.

  4. Sugar took same time to dissolve in both cups.

  5. After mixing sugar the water become sandy in both cups.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, sugar dissolve quickly in warm water. So this is a correct answer.

Multiple choice

Match the following.

1. Water A. Solution
2. Sand in water B. Solvent
3. Alcohol C. Universal Solvent
4. Sugar in water D. Insoluble impurities

  1. 1 - A, 2 - C, 3 - D, 4 - B

  2. 1 - D, 2 - A, 3 - B, 4 - C

  3. 1 - C, 2 - D, 3 - A, 4 - B

  4. 1 - C, 2 - D, 3 - B, 4 - A

  5. 1 - D, 2 - A, 3 - D, 4 - C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. Water is a universal solvent because it dissolves more substances than any other liquid. Sand and mud in water are insoluble impurities. Part of a solution that get dissolved while making it is called solute and sugar and water both make a solution.

Multiple choice

Study the following table and answer the question:

   
Substance Solvent Remark
Sand Water Does not dissolve
Sugar Water Dissolves
Salt Water Dissolves
Water Kerosene Does not dissolve
Oxygen Water Dissolves

Which of the following is a solution of a gas in a liquid?

  1. Sugar in water

  2. Salt in water

  3. Water in kerosene

  4. Oxygen in water

  5. Sand in kerosene
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the right answer. Here oxygen is a gas that makes a solution with water.

Multiple choice

Water can be used as ______________.

  1. organic solvent

  2. inorganic solvent

  3. universal solvent

  4. liquid solvent, which dissolves liquids only

  5. solid solvent, which dissolves solids only
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is called as 'universal solvent' because it can dissolve many types of liquids, solids, organic and inorganic chemicals.

Multiple choice

A solution is called an aqueous solution _________.

  1. when the solvent is alcohol

  2. when the solvent is glycerine

  3. when the solvent is water

  4. when the solvent is fruit juice

  5. when the sovlent is vinegar
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The solution in which a solute is dissolved in water (solvent) is called an aqueous solution. The solution in which a solute is dissolved in water (solvent) is called an aqueous solution.

Multiple choice

The solubility of a saturated solution increases upon

  1. heating

  2. cooling

  3. filtration

  4. condensation

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

The solubility of a saturated solution increases upon heating. For instance, if there is some undissolved sugar in a solution of water and sugar, and if it is heated, we find that the undissolved sugar at the bottom of the beaker dissolves. This is because the temperature increases.

Multiple choice

Detergent is mixture of which of the following?

  1. strong acid and strong base

  2. weak acid and weak base

  3. strong base and weak acid

  4. strong acid and weak base

  5. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Detergents are made from sodium hydroxide and fatty acids. Sodium hydroxide is a strong base in nature and fatty acids are weak acidic in nature.

Multiple choice

A thin layer of oil on water is called ______.

  1. oilute

  2. oilcote

  3. oil film

  4. oil slick

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

A thin layer of oil on water is called oil slick. Oil slicks float on oceans and seas, covering them in a thick film of crude or refined petroleum oil. When freight ships carrying tens of thousands of tons of fuel crash, malfunction, or encounter harsh weather, they spill enormous amounts of oil into the water.

Multiple choice

What is the main difference between boiling and evaporation?

  1. Boiling causes reduction in volume of liquid while evaporation does not.

  2. Changing of boiling liquid into vapour can be seen but evaporation cannot be seen.

  3. Boiling causes a change in the state of water while evaporation does not.

  4. Evaporation can take place at any temperature while boiling cannot.

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

For a given pressure, there is a temperature above which liquid cannot exist in liquid form. This temperature is called boiling point. At this pressure and at this temperature, if liquid is heated up, the temperature will not rise and heat is used only to convert the liquid into its vapour. The process of conversion of liquid into its vapour at this temperature is called boiling. Depending upon the pressure, there are many boiling temperature for a liquid. If the pressure is lowered the boiling temperature is lowered. For a given pressure, if the temperature of the liquid is below its boiling point, still the liquid is converted into vapour by the surface of the liquid. This process is called evaporation. Evaporation can take place at any temperature below the boiling temperature where as boiling can take place only at boiling temperature.