Solution

Q.

List the points of differences between homogeneous and heterogeneous mixtures.

Q. A solution contains 50 g of common salt in 350 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

1. 12.11%
2. 12%
3. 12.5%
4. 11%

Q. A solution is obtained by mixing 200g of 30% & 300g of 20% solution by weight, what is the percentage of solute in the final solution ?

Q.

___ is the ability of a substance to dissolve in a certain solvent.

Q. When two liquids are mixed together they form a homogenous solution. Such liquids are called _____.

1. miscible
2. saturated
3. concentrated
4. immiscible

Q.

If 25 ml of acetone mixed with 150 ml of water to form an aqueous solution, then calculate the volume percentage of solution?

Q. Which of the following statements is NOT true?

1. No more salt can be dissolved in a saturated solution of salt water without heating.
2. Water dissolves different amounts of soluble substances in it.
3. A mixture of milk and water can be separated by filtration.
4. Salt is separated from seawater by evaporation.

Q.

Which process is used to separate a dissolved solid from a solid-liquid solution?

1. Distillation

2. Sedimentation and decantation

3. Crystallization

4. Filtration

Q. On decreasing the temperature, what happens to the solubility of solute in solution?

1. decreases

2. remains same

3. increases

4. cannot be determined

Q.

Difference between solute and solvent.

Q.

A solution is said to be ________ if no more solute can be dissolved in solvent.

1. Pure

2. Impure

3. Saturated

4. Unsaturated

Q.

A solution that has dissolved as much solute as it is capable of dissolving at a given temperature is:

1. Only solution

2. Unsaturated solution

3. Saturated solution

4. Concentrated solution

Q.

State True or False.
Water dissolves different amount of different soluble substances in it.

1. True

2. False

Q.

Classify solutions

Q.

Question 13

Mixtures of red chilli powder in water, butter in water, petrol in water and honey in water were given to Radha, Sudha, Sofia and Raveena, respectively. Whose mixture is in solution form?

Q.

Classify the following into homogeneous and heterogeneous matter:

Kerosene

Q. Which of the following are insoluble in water?

1. Oil
2. Sodium phosphate
3. Sand
4. Sugar

Q.

4 liters of organic compound acetone are present in 90 liters of an aqueous solution. Calculate its volume percent.

Q.

A solution contains y ml of acetone in 150ml of solution. The concentration of the solution is $25\%$ in terms of volume by volume percentage. Find y.

1. 50 ml

2. 40 ml

3. 33.3 ml

4. 37.5 ml

Q.

Classify the following into homogeneous and heterogeneous matter:

Bronze which is an alloy of copper and tin

Q. An unsaturated solution:

1. cannot dissolve more solute
2. cannot add more solvent
3. cannot be made
4. can add more solute

Q.

More substances can be dissolved in a solution using heating.

1. True

2. False

Q.

Water can dissolve a large number of substances. But in a fixed amount of water, different amounts are dissolved for different substances.

1. True

2. False

Q.

How is a solution formed?

Q. Peanuts are separated from a mixture of peanuts and corn by ___

Q.

What is the term we use to describe substance dissolved in water?

1. Alcohol

2. Gram flour

3. Ammonium chloride

4. Water

Q.

What are the needs for separation of components of a mixture?

Q.

How are solutions generally classified? What is the basis of this classification?

Q. What is sedimentation?

Q.

Name a substance whose solubility increases gradually with temperature.