Types of Solution

Q.

Which aqueous solution has greater concentration - 1 molar or 1 molal of the same solute ? Give reason.

Q.

Give an example of solid solution in which the solute is a gas.

Q.

Sugar dissolves in cold water faster than in hot water.

1. True
2. False

Q.

What is the meaning of "Sol" in chemistry?

Q.

Define aprotic solvents.

Q.

What type of mixture is Ethanol and water ?

Q. What is the difference between molarity and normality?

Q.

2g each of solutes A and B are dissolved separately in 50g each of the same solvent. Which will show greater elevation in boiling point?

Q. A:Addition of HBr in buta-1, 3-diene gives 3-bromo but-1-ene as major product at low temperature. R::Addition of HBr in buta-1, 3-diene gives 1-bromo but-2-ene as major product at high temperature.

Q.

What are the properties of Colloids?

Q.

What is solute and solvent in air?

Q.

The dispersion of one liquid in another liquid is called as:

1. gel

2. sol

3. solid sol

4. emulsion

Q. The volume of a colloidal particle, $V_c$ as compared to the volume of solute particle in a true solution, $V_S$ could be

1. V _C/V _S = 10²³
2. V _C/V _S = 10³
3. V _C/V _S = 1
4. V _C/V _S = 10^–3

Q. Volume of a solution changes with change in temperature, then, will the molality of the solution be affected by temperature? Give reason for your answer.

Q.

QUESTION 2.2

Given an example of a solid solution in which the solute is a gas.

Q. The colligative properties of a solution depend on

1. Nature of solute particles present in it
2. Nature of solvent used
3. Number of solute particles present in it
4. Number of solvent only

Q.

Explain the terms with suitable examples:

(i) Alcosol (ii) Aerosol (iii) Hydrosol

Q. Which of the following is an example of a solution with a liquid solute and solid solvent?

1. Ethanol in water
2. Mercury - Silver Amalgam
3. Hexane in paraffin wax
4. Honey in honeycomb

Q.

Toothpaste is a _______ solution and vinegar is a __________ solution.

Q.

Vinegar is a colloidal solution of acetic acid in water.

1. True
2. False

Q.

Which of the following is a colloid?

1. Smoke

2. Sea water

3. Sugar solution

4. Aspirin

Q.

How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium ?

Q.

State two ways by which saturated solution can be changed to unsaturated solution?

Q.

The main characteristics of colloidal solution are

(i) It shows the Tyndall effect

(ii) Its size is between 10 to 100 nm

(iii) Heterogenous

(iv) Generally clear and transparent

1. (i), (ii) and (iii)

2. (i) and (iii)

3. (i) (ii) and (iii)

4. (i), (iii) and (iv)

Q.

A salt solution which can not dissolve more of a solute at a given temperature is called:

1. solution

2. saturated solution

3. unsaturated solution

4. supersaturated solution

Q.

A solution in which no more solute can be dissolved at a given temperature and pressure is called a saturated solution. At saturated solution stage equilibrium gets established among which two processes?

1. Dissolution and condensation

2. Sublimation and crystallisation

3. Dissolution and crystallisation

4. Evaporation and condensation

Q. Following are various types of colloids.
Match column X with column Y.
$\begin{array}{cc}\text{X (Colloids)}& \text{Y (Classification)}\\ \text{(i) Cloud}& \text{(P) P. Sol}\\ \text{(ii) Gelatin}& \text{(Q) Aerosol}\\ \text{(iii) Soap lather}& \text{(R) Emulsion}\\ \text{(iv) Milk}& \text{(S) Foam}\end{array}$

1. i- P, ii- R, iii- Q, iv- S
2. i- Q, ii- P, iii- S, iv- R
3. i- P, ii- Q, iii- R, iv- S
4. i- Q, ii- P, iii- R, iv- S

Q. What type of colloid is formed when a solid is dispersed in a liquid? Given an example.

Q.

Is sugar in water solution homogeneous or heterogeneous mixture?

Q. A gaseous mixture contains 220 gram of carbon dioxide and 280 gram of Nitrogen gas if the partial pressure of Nitrogen gas in the mixture is 1.5 atmosphere then the partial pressure of carbon dioxide gas in the mixture will be