ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Complete the statement by filling the blank with the correct word given below.

The law of conservation of mass is strictly valid if mass and _________ are considered together.

What is the effect on boiling point of water when pressure is increased?

What is the effect on boiling point of water when impurity is added.

Give reason for It is difficult to cook in hills compared to plain.

Give two examples of hydrated substances.

Give two examples for Efflorescent substance.

What do you observe when Washing soda is exposed to air ?

Define the Soft water.

Define the Hard water.

Name the compound responsible for temporary hardness.

Name the compound responsible for permanent hardness of water.

Suggest one method for the removal along with the reaction for temporary hardness.

Suggest one method for the removal along with the reaction for permanent hardness of water.

Name three water borne diseases.

Boiling removes the ................ hardness of water.

Temporary hardness of water can be removed by

Differentiate between Hard & soft water with suitable examples.

Differentiate between Temporary & permanent hard water with suitable examples.

Give balanced equation to show how temporary hardness enters into water.

Give balanced equation to show how temporary hardness in water can be removed by boiling.