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 separation of substances classification of mixtures mixtures: examples and properties types of solutions

Mixture is a physical combination of two or more pure substances.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mixture, a physical combination of two or more pure substances. A mixture is distinguished from a compound, which is formed by the chemical combination of two or more pure substances in a fixed, definite proportion. 

It should be noted that the components of a mixture retain their own chemical properties and may be present in any proportion.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

Gunpowder is an example of a__________.

  1. compound

  2. mixture

  3. element

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Gunpowder is an explosive mixture of potassium nitrate, charcoal, and sulphur in ratio 75 : 15: 10 used in time fuses, blasting and fireworks. 
It is obtained by mixing compounds so it is not a compound or an element.
Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

Which among the following statement(s) is/are true?

  1. Brass is an element

  2. Dry ice is a mixture

  3. Aerated drink, e.g., coca cola is a mixture

  4. Diesel is a mixture
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

A ) Brass is an alloy made of copper and zinc.
B) Dry ice, sometimes referred to as "cardice" (chiefly British chemists), is the solid form of carbon dioxide, so it is a compound.
C) Aerated drink would be anything that would have fizz (gas) filled in it. For example, your pepsi, coke, thums up, mirinda etc.
D) Diesel is mixture of many hydrocarbons.
Options C & D are correct.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

In a mixture, constituents exhibit:

  1. similar properties

  2. only those properties which are characteristic to the mixture.

  3. their own properties

  4. no properties
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Impure substances are commonly called mixtures. A mixture is a material containing two or more elements or compounds that are in close contact and are mixed in any proportion. The constituents of mixtures exhibit their individual properties. These constituents can be separated by physical means.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

A _____ is a mixture of two or more substances in a single phase.

  1. Element

  2. Compound

  3. Solution

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

A solution is a mixture of two or more substances in a single phase. At least two substances must be mixed in order to have a solution. Since solutions are mixtures, their compositions may vary over a very wide range. The concentrations may be expressed using a variety of measures.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

Which of the following statement is incorrect about mixtures?

  1. A mixture contains two or more substances

  2. Particles in mixtures are of more than one kind

  3. Compounds or elements in a mixture is mixed in any proportion by mass

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

A mixture is a combination of two or more materials, compounds or elements where there is no chemical combination or reaction.

Here materials can be anything for example: compounds, elements etc.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions

Statement (1): Mixture is a chemical combination of two or more elements.
Statement (2): Properties of the constituents of a mixture remain same.

  1. Statement I is true and Statement II is false

  2. Both statement I and II are true and II is not a correct explanation of statement I

  3. Both statement I and II are false

  4. Statement I is false and Statement II is true

  5. Both statement I and II are true and II is a correct explanation of statement I
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The mixture is a combination of two or more elements in such a way that no chemical reaction occurs. So, a mixture is a physical combination of two or more elements.

Properties of the constituents of a mixture remain same. The mixture can be separated back into its original constituents.
So statement 1 is incorrect and statement 2 is correct.
So D) is the correct answer.

Multiple choice chemistry separation of substances classification of mixtures mixtures: examples and properties types of solutions
When a gas dissolves in liquid, there is decrease in volume thus:

  1. increase of pressure will favour the dissolution of gas in liquid

  2. increase of pressure will not favour the dissolution of gas in liquid

  3. increase of pressure has no affect on the dissolution of gas in liquid

  4. increase of temperature will favour the dissolution of gas in liquid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
When a gas dissolves in liquid, there is decrease in volume thus increase of pressure will favour the dissolution of gas in liquid. Initially total volume decreases, the pressure decreases. Now when pressure is increased, the system will shift in a direction that will decrease the pressure to nullify the effect of increase in pressure. This is through the dissolution of gas in liquid. This is similar to Le-chatellier's principle for chemical equilibrium.
Note:
Decrease of temperature will favour the dissolution of gas in liquid.