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 chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

Which of the following can define molecules in the liquid state?

  1. Molecules vibrating in a fixed position and held in place by strong forces

  2. Molecules can rotate and roll over each other because the forces are moderately strong

  3. Molecules can move anyway in random because there are no forces holding the molecules together

  4. A state of matter which contains only charged particles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In liquid, particles are loosely bound together by intramolecular forces. Unlike a solid, liquid has no fixed shape but instead has a characteristic readiness to flow and therefore takes on the shape of any container.

Forces between them are moderately strong as compare to solid.

Hence, option $B$ is correct. 

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

What is meant by sublimation?

  1. Conversion of solid into liquid on heating

  2. Conversion of solid into gas on heating

  3. Conversion of liquid into gas on heating

  4. Change of shape of solid on heating
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Sublimation is easier for volatile materials which can be evaporated at low temperatures.


Hence, the correct option is $B$

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

The change of solid into vapours on heating and of vapours into solid on cooling is called :

  1. sublimation

  2. condensation

  3. distillation

  4. all of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There are many substances which are converted into gas from solid when heated, and converted from gas to solid when cooled without converting into liquid. Such substances are known as sublime and the proce3wss is called sublimation.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

Which of the fractions will be present maximum in precipitate?

  1. Least soluble substance

  2. Most soluble substance

  3. Both of the above

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

The component which is less soluble will get precipitated out and settle at the bottom and other component which is more soluble will remain in the solution

so, the least soluble substance will be maximum in precipitate.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

Sublimation is the procedure in which ___________.

  1. solid on heating decompose.

  2. solid on heating directly converts into vapor.

  3. solid on heating converts into solid again

  4. solid on heating converts into liquid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sublimation is the procedure in which solids on heating directly converts into vapor without converting into liquid phase. 

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

The solid which undergoes sublimation is called ________ , whereas the solid obtained by cooling vapors is called____________ .

  1. sublimate, sublime

  2. sublime, sublimate

  3. sublime, vapor solid

  4. sublime, sublime
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sublimation is conversion of solid of vapors on heating and vapors to solid on cooling. The solid which undergoes sublimation is called sublime, whereas the solid obtained by cooling vapors is called sublimate.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

All the impurities after crystallization are left behind in:

  1. mother liquor

  2. impurity solution

  3. dirt liqour
  4. both $B$ and $C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In crystallisation, the impure substance is dissolved in a suitable solvent to reach its nearly saturated solution at a temperature higher than the room temperature. At this high temperature, the solute has very high solubility in that solvent, so a much smaller quantity of hot solvent is needed for dissolving the solute than the solvent at room temperature.  When the solution is cooled, the pure substance is crystallised. The solution left behind is called mother liquor. All the impurities are left behind in the mother liquor. The purification method depends on the differences in solubility between the compound and the impurity.     

Multiple choice chemistry element, compound and mixture different types of solutions various mixtures introduction to solutions

A concentrated solution contains high amount of ________.

  1. solvent

  2. solute

  3. both solute and solvent

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A concentrated solution contains the maximum amount of solute that can be dissolved because solubility depends on temperature, a solution that is concentrated at one temperature may not be concentrated at a higher temperature.

Multiple choice physics chemical effects of electric current does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

Most liquids that conduct electricity are solutions of :

  1. acids

  2. bases

  3. salts

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most liquids that conduct electricity are solutions of acids, bases ,and salts (because the  solutions of acids, bases or salts are conducting in nature. They allow the current to pass through