Treatment of Washing Soda

Q.

How can the permanent hardness of water be removed?

1. By addition of washing soda
2. By addition of baking soda
3. By boiling
4. By addition of sodium carbonate

Q.

What are the five uses of washing soda?

Q. Permanent hardness of water is due to the presence of chlorides and salts of calcium and magnesium. It can be removed by using .

1. caustic soda
2. washing soda
3. sulphates
4. bicarbonates

Q. What are the daily uses of sodium and potassium?

Q.

Which of the following compound is formed during the removal of temporary hardness of water containing calcium bicarbonate through boiling?

1. Calcium Chloride
2. Calcium Sulphate

3. Calcium Nitrate

4. Calcium Carbonate

Q.

Choose the correct option regarding uses of washing soda:

1. It is used for removing permanant hardness of water.

2. It is used as a cleaning agent for domestic purposes.

3. It is used for manufacturing sodium compounds like borates.

4. All of the given options are correct

Q.

What exactly is calcium hydroxide cement and why do dentists use it?

1. Calcium hydroxide cement is used as a sealant of deep teeth cavities and dentists use it because it is cheaper

2. None of the choice

3. Calcium hydroxide cement are used as sealant of deep teeth cavities and dentists use it because of it's antibacterial properties

4. Calcium hydroxide cement are used as preparing new teeth sets and dentists use it because of its antibacterial properties

Q.

How can the permanent hardness of water be removed? Give proper chemical equation in support of your answer.

Q.

Name a chemical used to remove permanent hardness of water.

Q.

Which of the following compound is formed during the removal of temporary hardness of water containing calcium bicarbonate through boiling?

1. Calcium Chloride
2. Calcium Sulphate

3. Calcium Nitrate

4. Calcium Carbonate

Q. The chemical formula of washing soda is:

1. $\text{NaOH}$
2. $\text{NaCl}$
3. ${\text{NaHCO}}_3$
4. ${\text{Na}}_2{\text{CO}}_3\cdot 10{\text{H}}_2\text{O}$