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

Consider the following substances:

  1. Melting point of a substance increases on adding impurity.
  2. If the temperature of the surrounding is increased, the clock will lose the time.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect. Melting point of a substance decreases on adding impurity. Melting points are associated with packaging of molecules of substance. With the addition of impurities between the molecules, it decreases the melting point. Statement 2 is correct. When the temperature increases, the metallic pendulum expands. So, it takes more time to complete one oscillation. So, the clock loses time (goes slow).

Multiple choice

Consider the following statements:

  1. The temperature at which ice, water and steam co-exists is called triple point.
  2. Due to large specific heat capacity, hot water bottles are used to provide heat energy.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. Triple point is the temperature at which ice, water and steam co-exists. Statement 2 is also correct. Due to large specific heat capacity, hot water bottles are used to provide heat energy.

Multiple choice

Consider the following statements:

  1. Hot water extinguishes fire more effectively than cold water.
  2. When vapour condenses into liquid, it absorbs heat.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1 is correct. The fire extinguishing involves absorption of heat. The absorption of heat in converting hot water to steam is higher than the heat absorbed in heating cold water to the boiling temperature. Hot water readily converts to steam absorbing enormous amount of heat and therefore hot water is better for fire extinguishing purpose than cold water. Statement 2 is incorrect. When vapour condenses into liquid, it liberates heat.

Multiple choice

Consider the following: (1) Metal (2) Water (3) Air (4) Vacuum Which of the following is the correct ascending order of the mediums as per the speed of sound when it passes through them?

  1. 1, 2, 4, 3

  2. 4, 3, 2, 1

  3. 3, 4, 2, 1

  4. 1, 2, 3, 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct increasing order of speed of sound in the given materials as follows: Vacuum < Air < Water < Metal Sound requires the medium to travel. As the medium become denser, the speed increases.

Multiple choice

At boiling point, an enzyme is

  1. killed

  2. denatured

  3. unaffected

  4. inactivated

  5. all the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

At very high temperatures, the enzyme gets denatured as it is composed of amino acids and various amino acids are affected together by high temperatures.

Multiple choice

Which of the following is potable water?

  1. A glass of drinking water

  2. Water which kept in a large open pot

  3. Sea water

  4. Water with bacteria and chemicals

  5. Water of a pond
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Potable water is the water which is used for drinking purposes. So a glass of drinking water is potable water.

Multiple choice

What will happen if petrol is mixed with water and stirred?

  1. Crystals of petrol will form.

  2. Petrol will form a separate layer below the water.

  3. Petrol will form a separate layer on the surface of water.

  4. Petrol and water form a single layer.

  5. Water and petrol together will make a thick solution.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, petrol will form a separate layer on the surface of water because petrol is immiscible in water.

Multiple choice

Which of the following option is incorrect?

  1. Substance that dissolve in water are said to be soluble in water.

  2. Substance that do not dissolve in water are said to be insoluble in water.

  3. Substances dissolves faster in cold water than hot water.

  4. Soluble and insoluble impurities in water bodies causes water pollution.

  5. Insoluble impurities in water can be separated by sedimentation, decantation and filtration.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

No, substances dissolves faster in warm water. If we dissolve sugar or salt in warm water then it will dissolve faster than cold water.