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 of the following statements is not true about water?

  1. Aqua, hydrogen oxide, hydrogen hydroxide and hydrate are other names of water.

  2. Water is a transparent, almost colourless liquid with slight tint of blue.

  3. Melting point of water is 0 kelvin.

  4. Boiling point of water is 100�C.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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Multiple choice

The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?

  1. Ice is a bad conductor of heat.

  2. Since the surface of the lake is at the same temperature as the air, no heat is lost.

  3. The density of water is maximum at 4oC.

  4. None of the statements (1), (2) and (3) given above is correct.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Suppose temperature of water falling from 10 to 0 degree centigrade. When temperature of water falls upto 4 0 C, density of water will be maximum and water start sinking. Further temperature fall from 4 0C to 0 0C, density of water decreases continuously. In such condition water dose not sink and converted into ice and float on surface of water. At the same time 4 degree centigrade of temperature of interior water is maintained because ice is bad conductor of heat.

Multiple choice

A student is doing some experiments in the chemistry lab. He goes to take the temperature of a liquid, which is boiling in a beaker. While doing so, he checks the temperature of the boiling liquid by dipping a lab thermometer into it. Why does he not take the thermometer out of the liquid before reading the temperature?

  1. The level of mercury rises when it is taken out.

  2. He does it by mistake.

  3. The level of mercury begins to fall as soon as the lab thermometer is taken out.

  4. The temperature of air will be added.

  5. This is done as it is not a solid.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The level of mercury begins to fall as soon as the lab thermometer is taken out as the air around has lesser temperature.

Multiple choice

Consider the following metals:

  1. Gun powder is a compound of copper.
  2. Heavy water, used in nuclear reactor, is basically deuterium oxide.

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. Gun powder is a compound of sulphur. Statement 2 is correct. Heavy water, formally called deuterium oxide or 2H2 or D2O, is a form of water that contains a larger than normal amount of the hydrogen isotope, deuterium.

Multiple choice

Why is water called an 'universal solvent'?

  1. It is found everywhere.

  2. It can dissolve almost all the substances.

  3. It can put off fire.

  4. It is necessary for life to survive.

  5. It exists in solid, liquid and gaseous states.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is called an 'universal solvent' because it can dissolve almost all the substances.

Multiple choice

Which of the following is the correct spelling of 'preatiness'?

Directions: Read the following passage carefully and select the most suitable option from each list according to the corresponding number in the passage.
A candle's beauty is not preatiness (1) of colour or shape, but rather (2) something else: "Not the best-looking thing, but the best-acting thing." A candle taps (3) all of the known laws of the universe.
The heat of the flame melts the wax and draws up (4) currents of air to cool the wax at the periphery, thus creating a cup (5) for the molten wax, which remains horizontal thanks (6) to gravity - "the same force of gravity which holds worlds together". Capillary action draws the melted wax up the wick from cup to flame, while the flame's heat triggers (7) a chemical reaction in the wax that sustains (8) the flame.

  1. prittiness

  2. pretiness

  3. pretyness

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

The correct spellings are 'prettiness'.

Multiple choice

Which of these fits gap 23?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.

”Water, water everywhere, not a drop to drink” The problem faced in the middle of the sea by a ___(21)_____ sailor, troubles us regularly in our daily lives. Life cannot _____(22)______ without water, and we get thirsty without drinking it.______(23)_____, natural water, or that from faulty supplies, may carry harmful substances or bacteria. They pollute or damage the purity of water, and sicken our body. That is why, it is always very important to make sure while drinking, that the glasses are clean, and the water is____(24)_____ to drink. 



 

  1. Although

  2. Meanwhile

  3. However

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

The sentence provides a contrast and tells us why natural water may also be harmful.

Multiple choice

Which of these fits gap 22?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.

”Water, water everywhere, not a drop to drink” The problem faced in the middle of the sea by a ___(21)_____ sailor, troubles us regularly in our daily lives. Life cannot _____(22)______ without water, and we get thirsty without drinking it.______(23)_____, natural water, or that from faulty supplies, may carry harmful substances or bacteria. They pollute or damage the purity of water, and sicken our body. That is why, it is always very important to make sure while drinking, that the glasses are clean, and the water is____(24)_____ to drink. 



 

  1. sustain

  2. survive

  3. maintain

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

'Sustain' is the correct answer. It means life cannot be supported without water.

Multiple choice

Which of these fits gap 21?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.

”Water, water everywhere, not a drop to drink” The problem faced in the middle of the sea by a ___(21)_____ sailor, troubles us regularly in our daily lives. Life cannot _____(22)______ without water, and we get thirsty without drinking it.______(23)_____, natural water, or that from faulty supplies, may carry harmful substances or bacteria. They pollute or damage the purity of water, and sicken our body. That is why, it is always very important to make sure while drinking, that the glasses are clean, and the water is____(24)_____ to drink. 



 

  1. alone

  2. separated

  3. lonely

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

Here the reference is to a person who is separated from mankind on high seas. Alone only means one, whereas the sense conveyed here is isolated.

Multiple choice

Which of these fits gap 24?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.

”Water, water everywhere, not a drop to drink” The problem faced in the middle of the sea by a ___(21)_____ sailor, troubles us regularly in our daily lives. Life cannot _____(22)______ without water, and we get thirsty without drinking it.______(23)_____, natural water, or that from faulty supplies, may carry harmful substances or bacteria. They pollute or damage the purity of water, and sicken our body. That is why, it is always very important to make sure while drinking, that the glasses are clean, and the water is____(24)_____ to drink. 



 

  1. dirty

  2. sweet

  3. enough

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

Qualities of drinkable water are being talked about. Therefore 'safe' is the correct answer.