HARD
9th ICSE
IMPORTANT
Earn 100

Normally, the solubility of a crystalline solid increases with temperature. Does it increase uniformly in every case? Name a substance whose solubility:
increases rapidly with temperature.

Important Questions on Water

HARD
9th ICSE
IMPORTANT
Normally, the solubility of a crystalline solid increases with temperature. Does it increase uniformly in every case? Name a substance whose solubility:
increases gradually with temperature.
HARD
9th ICSE
IMPORTANT
Normally, the solubility of a crystalline solid increases with temperature. Does it increase uniformly in every case? Name a substance whose solubility:
increases slightly with temperature
HARD
9th ICSE
IMPORTANT
Normally, the solubility of a crystalline solid increases with temperature. Does it increase uniformly in every case? Name a substance whose solubility:
actually decreases with a rise in temperature.
MEDIUM
9th ICSE
IMPORTANT
What are drying agents or desiccating agents? Why is anhydrous calcium chloride used as a desiccator?
MEDIUM
9th ICSE
IMPORTANT

In which of the following substances can there be an increase in weight when they are exposed to air.

1. Sodium chloride

2. Iron

3. Concentrated sulphuric acid

4. Table salt

5. Sodium carbonate crystals

MEDIUM
9th ICSE
IMPORTANT

In which of the following substances can there be: decrease in weight

1. Sodium chloride

2. Iron

3. Concentrated sulphuric acid

4. Table salt

5. Sodium carbonate crystals

MEDIUM
9th ICSE
IMPORTANT

In which of the following substances can there be: no change in weight when exposed to air?

1. Sodium chloride

2. Iron

3. Concentrated sulphuric acid

4. Table salt

5. Sodium carbonate crystals

MEDIUM
9th ICSE
IMPORTANT
Define: Hygroscopy