Solubility

Q.

17. List the following substances as the soluble and insoluble substances in water.

Sand, sugar, vinegar, common salt, chilli, Ghee

Q. Which of the following are soluble in water?

1. Salt
2. Sugar
3. Hair oil
4. Lemon juice

Q. Substances that completely dissolve in water are called soluble substances.

1. True
2. False

Q. Sand is soluble in water.

1. True
2. False

Q.

Is vinegar soluble in water?

Q.

How can the solubility of a substance be increased? (three ways)

Q.

John was preparing tea. He added tea leaves and sugar in the water then he observed that sugar dissolved in water but the tea leaves did not. Looking at this situation we can classify tea leaves and sugar by which property?

1. Solubility and insolubility

2. Appearance

3. Transparency

4. Ductility

Q.

Which of the following substances is insoluble in water?

1. Vinegar

2. Salt

3. Sugar

4. Sawdust

Q.

Density of iron is ______ than the density of water.

Q.

Question 25

Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petal of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.

Q.

State whether the statements given below are True or False

(c) Chalk dissolves in water

1. True
2. False

Q. Which among the following is insoluble in water?

1. Soda
2. Salt
3. Chalk
4. Sugar

Q. You are provided with the following materials— turmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.​

​

Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substances.​

Q. Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.​

Q.

If the temperature of a substance is increased, what will be the effect on its density?

Q. Sugar and saw dust can be separated from water by , and respectively.

1. evaporation
2. filtration
3. sieving
4. winnowing

Q. The solution in which no more solutes can be dissolved is known as

1. Saturated solution
2. Temperate solution
3. Unsaturated solution
4. Normal solution

Q.

The substances which dissolve rapidly in water are called

1. Insoluble substances

2. super soluble substances

3. soluble substances

4. none of these

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

1. Transparency
2. Lustre
3. Solubility
4. Hardness

Q. Define saturated and unsaturated solutions.

Q. John was preparing tea. He added tea leaves and sugar in the water then he observed that sugar dissolved in the water but the tea leaves were still there in the water. Looking at this situation we can classify tea leaves and sugar on which property?

1. Solubility and insolubility
2. Transparency
3. Objects may float or sink in the water
4. Appearance

Q. Arrange the following substances in the decreasing order of their ability to dissolve 100 g of salt.

1. Water at $100°C$
2. Water at $40°C$
3. Water at $50°C$
4. Water at $80°C$

Q.

Question 4 (viii)

State whether the statement given below is True or False.

Vinegar dissolves in water.

Q. What is the pH of a saturated solution of Mg(OH)${}_2$?
$(K_{sp}$ for $Mg(OH{)}_2=1.8\times {10}^{-11})$

1. 3.5
2. 10.1
3. 10.9
4. 10.5
5. 9.2

Q. A solution with more dissolved solute in the solvent can be obtained by raising the temperature.

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

Q.

2. You are provided with the following materials: Turmeric, honey, mustard oil, water, glucose, rice flour, and groundnut oil.

Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substance.

Q. Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar?​

Q. Freshwater is the unusable form of water.

1. False
2. True

Q.

Identify the solubility of all the given materials in water:

Sand, sugar, salt, glucose, rice flour, groundnut oil.

Q. Arrange the following substances in the decreasing order of their ability to dissolve 100 g of salt.

1. Water at $100°C$
2. Water at $40°C$
3. Water at $50°C$
4. Water at $80°C$