Saturated,Unsaturated and Supersaturated Solutions

Q.

Iodine solution is a solution of

1. pure iodine

2. potassium iodide solution

3. iodine and Potassium iodide solution

4. iodine and Potassium dichromate solution

Q.

What is tincture of Iodine? Identify the solute and solvent in it. Why Tyndall effect is not seen in a true solution?

Q. Solid foam has:

1. solid dispersed in a solid.
2. liquid dispersed in a solid.
3. gas dispersed in a solid.
4. solid dispersed in a liquid.

Q. What do you mean by water of crystallization?

Q. The stage at which no more solute can be dissolved in the given solvent is called point.

1. saturation
2. critical
3. dissolution

Q.

Differentiate between saturated and unsaturated solutions.

Q.

Define supersaturated solution

Q.

How can you distinguish between saturated and unsaturated solutions?

Q.

Do hydrated salts appear moist when touched?

Q.

What is the change of a solid directly into its vapour state without passing through the liquid state called?

Q. A supersaturated solution is a metastable solution whose concentration:

1. is equal to the solubility of the substance in solvent
2. is less than the solubility
3. exceeds the solubility
4. continuously changes

Q. How much should the pressure be increased in order to decrease the volume of a gas by 15% at constant temperature?

Q.

Define Supersaturated solution.

Q. When a crystal of a solute is introduced into a supersaturated solution of the solute:

1. the solute dissolves
2. the solution remains supersaturated
3. the solution becomes unsaturated
4. the excess of solute crystallises out

Q. A beaker contains a solution of substance '$A$'. On dissolving substance '$A$' in small amount in this solution, precipitation of substance '$A$' takes place. The solution is

1. Concentrated
2. Saturated
3. Super saturated
4. Unsaturated

Q. A beaker contains a solution of substance ${}^{\prime }{A}^{\prime }$. Precipitation of substance ${}^{\prime }{A}^{\prime }$ takes place when a small amount of ${}^{\prime }{A}^{\prime }$ is added to the solution. The solution is:

1. supersaturated
2. concentrated
3. unsaturated
4. saturated

Q. Any solution containing more solute than that required to prepare a saturated solution, at any fixed temperature is called :

1. supersaturated solution
2. saturated solution
3. unsaturated solution
4. dilute solution

Q. Assertion :A super-saturated solution of glucose in boiling water crystallizes as it cools. Reason: The solubility increases as the temperature decreases.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. To determine whether a water solution of ${Na}_2{S}_2{O}_3$ at room temperature is supersaturated, one can :

1. heat the solution to its boiling point
2. add a crystal of ${Na}_2{S}_2{O}_3$ to the solution
3. add water to the solution
4. acidify the solution
5. cool the solution to its freezing point

Q. To from a super saturated solution of salt one must:

1. cool slowly
2. cool rapidly
3. add some salt to cold solution
4. use a clear vessel

Q. To form a super saturated solution of salt one must :

1. cool slowly
2. cool rapidly
3. use a clear vessel
4. add some salt to cold solution

Q. With increase of temperature, a saturated solution converts into super saturated solution.

1. True
2. False

Q. When no more solute can be dissolved in a solution at a given temperature, then such a solution is called a/an:

1. Unsaturated solution
2. Supersaturated solution
3. Saturated solution
4. Subsaturated solution

Q. Which of these actions will cause more potassium nitrate to dissolve in a saturated potassium nitrate solution?
I. Grind the potassium nitrate and then add to the solution while stirring
II. Add more potassium nitrate while using a magnetic stirrer
III. Add more potassium nitrate and heat the solution

1. I and III only
2. I only
3. I, II, and III
4. III only
5. II only

Q.

A solution is said to be ___ if it can hold more of the solute in the given solvent at that temperature.

Q.

A solution in which no more solute can be dissolved in solvent is known as:-

1. Dilute solution

2. Unsaturated solution

3. Supersaturated solution

4. Saturated solution

Q.

Harry: Hey Hermione, does a supersaturated solution made by increasing temperature stay like that forever when left idle in a room?
Hermione gave him a blank look thinking Harry was an idiot.

Why did Hermione think Harry was an idiot?

1. Because supersaturated solutions stay forever once made.
2. Because a supersaturated solution can be formed for a limited time only.
3. Because a solution can never be supersaturated. It is an idealistic phenomenon.
4. Because all solutions are supersaturated.

Q. Which of the following is true for a homogeneous mixture?

1. Particles are separable
2. Uniform composition
3. Non-uniform composition
4. Particles are visible

Q.

Harry Potter wanted to make a supersaturated solution of dragonwood in his potions class. Select from the following which would allow him to make one.
Note: Cauldron is just a vessel.

1. Reduce the volume of water in the cauldron.

2. Increase the temperature of water.

3. Increase the pressure of the gas.

4. Reduce the pressure of the gas.

Q.

What do you understand by the following terms?

(i)Saturated solution

(ii)Unsaturated solution

(iii)Super-saturated solution.