Classification Based on Solubility

Q. Identify the solute and solvent in a salt solution.

1. Solute - salt; Solvent - water
2. Solute - water; Solvent - salt
3. Solute - salt; Solvent - salt
4. Solute - water; Solvent - water

Q. What is slime? A liquid or a solid?

Q. All gases are soluble in water.

1. True
2. False

Q.

Does chalk powder dissolve in water? If not why?

Q.

Question 4 (iii)

State whether the statement given below is True or False.

Chalk dissolves in water.

Q.

Is ${\mathrm{PbCl}}_2$ soluble in water?

Q.

Why does solubility increase with increase in temperature?

Q.

What is an insoluble substance?

Q.

Question 7 (d)

Find the odd one out from the following:
Sugar, Salt, Sand, Copper sulphate

Q.

Why is sand insoluble but sugar soluble as the atoms present in the water have gap between them then any substance can fill those gaps .

Q. Water dissolves a large number of substances. Therefore, it is called as:

1. universal solvent
2. common solvent
3. universal solute
4. natural solvent

Q.

Question 23

Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants.

Q.

Which among the following substances is insoluble in water?

1. Sawdust
2. Salt
3. Vinegar
4. Sugar

Q.

Oxygen is _____ in water. (insoluble/soluble)

Q. What happens if one table spoon of salt is added to saturated solution of salt and water ? What will be the effect of heating this solution .

Q.

When we mix oil in a glass of water, two things happen:

1) The oil does not mix with water.

2) It settles on top of water making a separate layer.

What is the reason for these two phenomena? Mention the property being exhibited by the oil. [3 MARKS]

Q. Are there any other factors to increase the solubility of a solute other than-
🔹By increasing the amount of the solvent.
​​​🔹By stirring the solvent.
🔹By heating the solvent.
​​​​​

Q.

Why do electrons have potential energy?

Q. Salt dissolves in water to form a solution. Identify the solvent.

1. Salt water
2. Water
3. Salt
4. Salt water and water

Q.

The direction of translocation of solutes is

1. Upward

2. Downward

3. Radical

4. All of these

Q.

Question 02

Pick one material from the following which is completely soluble in water.

(a) Chalk Powder

(b) Tea leaves

(c) Glucose

(d) Sawdust

Q.

What happens when an electron jump from a lower to a higher energy level?

Q. Do chalk powder mix in water

Q.

Liquid such as petrol and vegetable oil are miscible

1. True
2. False

Q.

State True or False.
The solubility of a solution increases with the increase in temperature.

1. True

2. False

Q.

A mixture of 80 ml ethanol and 20 ml water can be called a solution of water in ethanol.

1. True
2. False

Q.

Name one salt whose solubility first increases and then decreases with a rise in temperature.

Q. Which of the following materials are soluble in water?

1. Sand
2. Sugar
3. Sawdust
4. Salt

Q.

Name the major salts dissolved in sea water. What is the maximum percentage of the salt which is found in seawater?

Q. A vendor sells table salt mixed with white stone powder. Which of these properties will help you detect this malpractice?

1. Ductility
2. Opacity
3. Density
4. Solubility