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 chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

Which of the following is potable water?

  1. A glass of water fit for drinking

  2. Water in a pot

  3. Sea water

  4. Water with bacteria and chemicals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A glass of water is fit for drinking. Water in a pot may contain impurities like dust, sand, etc. Sea contains huge number of impurities including huge levels of salts and water with bacteria and chemicals and is not preferred for drinking. 

Multiple choice chemistry element, compound and chemical reaction materials around us materials around us and different types of houses matter and its states

Plasma state refers to:

  1. super cooled gaseous state

  2. super heated gaseous state

  3. super cooled liquid state

  4. super heated liquid state
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plasma state refers to the super heated gaseous state.
Plasma state is obtained by heating a gas above 5000 $^o$C. The number of electrons in the atoms or molecules decreases or increases, to form positively or negatively charged ions and also the molecular bond breaks.

Multiple choice physics the kinetic model of matter evaporation heat, internal energy and work phase change

What happens to the rate of evaporation when there is more exposed surface area of liquid?

  1. It decreases gradually

  2. It increases

  3. Remains same

  4. It decreases rapidly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is a process in which some molecules of a liquid, which have greater kinetic energy, escape from the liquid and enter the atmosphere.

When the surface area exposed is more, the molecules get greater opportunity to escape. Hence more molecules escape and rate of evaporation increases.

Multiple choice physics the kinetic model of matter evaporation heat, internal energy and work phase change

The moving air from the hair dryer removes the molecules of liquids as soon as they escape from the surface of your  hair.
Which factor of evaporation is responsible for the above example?

  1. Temperature

  2. Motion of air

  3. Nature of liquid

  4. Humidity of surrounding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is a process in which some molecules of a liquid, which have greater kinetic energy, escape from the liquid and enter the atmosphere.

Evaporation occurs faster at a higher temperature.
The wind of the hairdryer being hotter than room temperature, speeds up the evaporation process.

Multiple choice physics the kinetic model of matter evaporation heat, internal energy and work phase change

Choose the correct statements from the following

  1. Evaporation takes place from the surface of a liquid at all temperatures.

  2. The rate of evaporation depends upon the area of the exposed surface of the liquid, nature of the liquid and its temperature.

  3. The rate of evaporation depends on the pressure to which the liquid is subjected.

  4. The cooling produced in evaporation is a consequence of the fact that a liquid has latent heat.
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation

Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase. So there is loss of energy due to latent heat of the liquid.

For molecules of a liquid to evaporate, they must be located near the surface, they have to be moving in the proper direction, and have sufficient kinetic energy to overcome liquid-phase inter-molecular forces. When only a small proportion of the molecules meet these criteria, the rate of evaporation is low. Since the kinetic energy of a molecule is proportional to its temperature, evaporation proceeds more quickly at higher temperatures and high surface area.
Evaporation happens faster if there is less exertion on the surface keeping the molecules from launching themselves.
So all the options are correct.

Multiple choice physics the kinetic model of matter evaporation heat, internal energy and work phase change

Soda bottles are made of thick glass so that they can withstand an increase in :

  1. pressure during summer

  2. temperature during summer

  3. viscosity

  4. potential energy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Gas, liquid and solid expand on heating.
Gas expands the max. due to free of gas molecules or almost zero force of attraction between them. On heating they gain K.E. and move up to any place. This gives expansion of gases.
The pressure of gas inside closed container increases upon heating. This is seen that soda bottle explodes in summer. So the air made up of thick glass so that they can withstand pressure.