The Amazing World of Solutes Solvents and Solutions Class 8 Assertion and Reason Questions

The Amazing World of Solutes Solvents and Solutions Class 8 Assertion and Reason Questions

The Amazing World of Solutes Solvents and Solutions Class 8 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options:

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): A saturated solution can dissolve more solute at a given temperature.

(R): A saturated solution contains the maximum amount of solute that can be dissolved at that temperature.

Answer:

(d) A is false, but R is true.

2. (A): The solubility of most solids in liquids increases with an increase in temperature.

(R): Higher temperatures provide more energy to the solute particles, allowing them to break apart and mix with the solvent.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

3. (A): Oil floats on water because it is denser than water.

(R): The density of oil is less than that of water.

Answer:

(d) A is false, but R is true.

4. (A): The density of a substance generally decreases with an increase in temperature.

(R): As temperature increases, the volume of a substance typically increases while its mass remains constant.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

5. (A): A mixture of sand and water is a solution.

(R): A solution is formed when two or more substances mix to form a uniform mixture.

Answer:

(d) A is false, but R is true.