Sodium Carbonate

Q. List some important uses of bases.

Q.

The correct experiment set-up to study the reaction between barium chloride and sodium sulfate is

1. I

2. II

3. Both I and II

4. Neither I nor II

Q.

Give reason for the following:

What will happen if calcium chloride (${\mathrm{CaCl}}_2$) is left exposed to air?

Q. How can carbon dioxide be formed by using hydrochloric acid?

Q. is added to remove the hardness of water.

1. ${\text{NaHCO}}_3$
2. ${\text{Na}}_2{\text{CO}}_3.10{\text{H}}_2\text{O}$
3. ${\text{CaSO}}_4.1/2{\text{H}}_2\text{O}$
4. $CaOC{l}_2$

Q. Which gas is produced when sodium carbonate reacts with dilute hydrochloric acid?

Q.

Name the salt which is mixed with carbon dioxide and calcium carbonate in the manufacturing of glass.

1. Copper sulphate

2. Sodium carbonate

3. Calcium sulphate

4. Sodium bicarbonate