Mixtures and its Properties

Q.

The size of particles in suspension, true solution and colloidal solution varies in the order:

1. Suspension < Colloidal < True solution
2. Suspension > (Colloidal + True solution)
3. True Solution > Colloidal> Suspension
4. Suspension > Colloidal > True solution

Q. Which of the following statements about a mixture is TRUE?

1. It is a pure substance
2. Formation of a mixture is a physical change
3. Its constituents do not retain their individual properties
4. It is always homogeneous

Q. is considered to be an impure substance.

1. Tap water
2. Distilled water
3. Deionized water

Q. The air we breathe is a pure substance.

1. Molecule
2. Mixture

Q. Which of the following refers to the physical combination of two or more substances in which the identities of the individual components are retained?

1. Compound

2. Mixture

3. Element

4. Pure substance

Q.

Name a ‘pure’ and an ‘impure’ form of water in its natural state.

Q. Arrange the following mixtures, suspension, true solution and colloidal solution in the decreasing order of their particle size.

1. Suspension > Colloidal > True solution

2. Suspension > True solution > Colloidal

3. True solution > Colloidal > Suspension

4. True solution > Suspension > Colloidal

Q. Statement 1: Air, lemonade and milk are mixtures.
Statement 2: Copper, aluminium and iron are elements.

1. Both statement 1 and statement 2 are incorrect.
2. Both statement 1 and statement 2 are correct.
3. Statement 1 is correct and statement 2 is incorrect.
4. Statement 2 is correct and statement 1 is incorrect.

Q.

What are the differences between colloid and suspension on the basis of characteristics?

Q.

The term we use to describe water and undissolved material in it is __________.

1. Colloid

2. Dispersion

3. Dispersed

4. Suspension

Q.

Match the statements in the list I, 1-10 with their correct answer in list II, A to J

Column 1	Column 2
Sodium Carbonate and Water	Sea Water
Chemicals used in sedimentation during purification of water	Preferred place for an organism
Vaporisation	Liquid state
Kerosene and Water	Aqueous solution
A solution that can dissolve more solute at a given temperature	Dissolved gases and minerals
Water as a habitat of marine life	Unsaturated solution
A water-borne disease	Immiscible mixture
Existence of water at $0°\mathrm{C}$and $100°\mathrm{C}$	Liquid to gaseous state
Taste in water is due to	Dysentery
The most impure form of water	Alum

Q.

Give reasons for the statement ‘Air is a mixture.’

Q.

As the temperature of a mixture increases, when one part of the mixture melts, the other part ___

1. may not melt

2. will never melt

3. will always melt

4. none of these

Q. Consider a mixture of table salt and iron fillings. As the temperature of a mixture increases, one component of the mixture melts. What happens to the other component of this mixture?

1. will always melt

2. will never melt

3. may not melt

4. none of these

Q.

As the temperature of a mixture increases, when one part of the mixture melts, the other part _________.

1. may not melt

2. will always melt

3. will never melt
4. none of these

Q. Is paint a colloid or suspension ??

Q. What is formed by physical combination of two or more substances, which retain their identities?

1. Compound
2. Mixture
3. Element
4. Pure substance

Q.

Tick (✓) the most appropriate answer.

In which of the following substances do its constituents retain their properties?

1. Atom

2. Element

3. Compound

4. Mixture

Q. Cough syrup is an example of suspension or colloids?

Q. Which of the following kind of solution is not possible?

1. Solid in Liquid solution
2. Gas in Liquid solution
3. All these are possible
4. Gas in Gas solution

Q.

The constituents of a mixture, are present in:

1. fixed ratio

2. any ratio

3. in the ratio of 4 : 1

4. none of these

Q. What is formed by physical combination of two or more substances, which retain their identities?

1. Pure substance
2. Element
3. Mixture
4. Compound

Q. Air can be regarded as a/an .

1. compound
2. mixture
3. element

Q. The information given below describes the properties of a certain type of mixture.

1. The particle size is around ${10}^{-5}$ m.
2. The constituent particles cannot be separated by filtration.
3. When a laser beam is passed through it, it clearly shows the path of the laser beam.

Which amongst the following shows the given properties?

1. Milk and water
2. Iron and wooden blocks
3. Nitrogen and carbon dioxide
4. Blood also show these properties