Give reasons for the following:

• Hard water is not fit for washing clothes.

Which one of the following is not a true solution?

What is the chemical formula of baking soda?

A fixed number of water molecules loosely bound to the salts is called

Which is homogeneous?

Which of the following substances is green in colour?

Name the following.

• A colloidal solution

Name the following.

• Chemicals that can cause temporary hardness of water

Name the following.

• A method to remove the temporary hardness of water.