ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.

Give reason for the following:

Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.

Give reason for the following:

Washing soda can be used to remove both temporary and permanent hardness in water.

How do the solubility of a solid and a gas affected by Increase in temperature.

Give two examples of Drying agent.

Give two example of Solvent other than water.

Give reason for Table salt becomes moist during rainy season.

Why is sea water salty ?

Discuss the importance of water as a solvent for our body .

Discuss the importance of water as a solvent for plants.

What do you mean by solubility of a solute in a solvent ?

Give a reason why water is called a ‘universal solvent’ but, an alkali is not.

Give a reason why boiled water tastes flat.

Select the correct answer of the following statement:

The medium of dissolution which allows the solute to dissolve in it.