Chapter 7 Solution and Suspension

(Solving the problems is the solution of problems than increasing the problems by worrying on the problems…!)

Definitions

Chemistry MCQs Dr. Sajid Ali Talpur

1. Solution: -the homogeneous mixture of two or more things.

2. Solute: - It is the component of solution present in smaller amount and is dissolved by the solvent.

3. Solvent: - It is the component of solution present in greater amount and dissolves the solute.

4. Unsaturated solution: - It is that one solution which contains less solute than it has the capacity to dissolve.

5. Saturated solution: - It is that one solution which contains maximum amount of solute and can not dissolve more solute at a given temperature

6. Super saturated solution: - It is that one solution which contains more solute than the normal capacity and this is done usually by increasing temperature.

7. Crystallization: - The process in which dissolved solute comes out of solution and forms crystals is called crystallization.

8. Molarity: - The number of moles of solute dissolved in 1 liter (1dm3) of a solution is called molarity. It is denoted by (M).

Chemistry MCQs Dr. Sajid Ali Talpur

9. Molality : - The number of moles of solute dissolved in 1 kilogram of solution is called molality. It is denoted by (m).

10. Mole fraction: - Mole fraction of any component in a solution is the number of moles of the component divided by total number of moles making up solution. It is denoted by X.

11. Suspension: - It is defined as a heterogenous mixture consists of visible particles which remain suspended in the liquid.

Multiple Choice Questions

1. A heterogeneous mixture of two or more substances is called solution:

Chemistry MCQs Dr. Sajid Ali Talpur

a) true b) false

2. there are types of solutionsa) 2 b) 3c) 5 d) 9

3. The composition of air is asa) 78% N2, 21% O2, 1% Ar.b) 78% N2, 15% O2, 5% CO2, 1 other gasesc) 78% N2, 21% O2, 1% other gasesd) all are possible

4. alloys are the mixture of:a) solid-solid b) solid-liquidc) liquid-gas d) solid-gas

5. which of the following does not affect the solubility:a) temperature b) size of particlesc) pressure d) nature of solutee) nature of solvent

6. the solubility of gases increases with the increase in temperature.a) true b) false

7. Only the solubility of is affected by pressure.a) solids b) liquidc) gases d) plasma

8. ionic compounds are not dissolved in:a) polar solvent b) non-polar

c) water d) A.O.T

Chemistry MCQs Dr. Sajid Ali Talpur

9. A solution which has the capacity to dissolve more solute is called:a) saturated solution b) unsaturated solutionc) super saturated d) N.O.T

10. the process in which the dissolved solute comes out of the solution is called:a) titration b) solubilityc) crystallization d) N.O.T

11. what is the molarity of a solution when 10 g NaOH are dissolved in 1 liter solution:a) 0.25M b) 0.5Mc) 1M d) 2M

The Book MCQs

12. the suspended particles in the suspensions are generally of the size:a) 10nm b) 100nmc) 1000nm d) 1200nm

13. the sum of mole fraction of solute and solvent is equal to:a) 1 b) 2c) 3 d) 4

14. solubility is defined as the amount of solute in gram at a given temperature, dissolved in ……of the solvent.a) 10g b) 20gc) 100g d)1000g

Chemistry MCQs Dr. Sajid Ali Talpur

15. the process in which solid directly changes to vapours is called.a) sublimation b) evaporationc) diffusion d) boiling

16. the solubility of gas …….with the rise in temperature.a) increase b) decrease

Answer Key

1 B 2 D 3 C4 A 5 B 6 B7 C 8 B 9 B10 C 11 A 12 C13 A 14 C 15 A16 B

Chemistry MCQs Dr. Sajid Ali Talpur