Hard Water

Q. The hardness of water is due to the presence of:

1. calcium and magnesium salts
2. sodium and magnesium salts
3. calcium and sodium salts
4. ammonium and sodium salts

Q. water is an example of soft water.

1. Rain
2. River
3. Sea

Q. Which of the following pairs are correct?

1. None of these
2. Soap - Ammonium or Sulphonate salts of long chain carboxylic acids, Detergent - Sodium or Potassium salts of long-chain carboxylic acids
3. Detergent - Ammonium or Sulphonate salts of long chain Carboxylic acids, Soap - Sodium or Potassium salts of long-chain Carboxylic acids
4. Detergent - Ammonium or Sodium salts of long chain Carboxylic acids, Soap - Sodium or Sulphonate salts of long-chain Carboxylic acids

Q. Soap forms insoluble precipitates with the calcium and magnesium ions in hard water.

1. True
2. False

Q. The hardness of water is due to the presence of:

1. Calcium and Magnesium salts

2. Sodium and Magnesium salts

3. Calcium and Sodium salts

4. Sodium salts

Q.

Which of the following pairs are correct?

1. Detergents and soaps have the same salts

2. Soap - Ammonium or Sulphonate salts of long chain carboxylic acids,
   Detergent - Sodium or Potassium salts of long-chain carboxylic acids

3. Detergent - Ammonium or Sodium salts of long chain Carboxylic acids,
   ​Soap - Sodium or Sulphonate salts of long-chain Carboxylic acids

4. Detergent - Ammonium or Sulphonate salts of long chain Carboxylic acids,
   ​Soap - Sodium or Potassium salts of long-chain Carboxylic acids

Q.

Detergents are ammonium or sulphonate salts of long chain _________.

1. Aldehydes

2. Carboxylic acid

3. Sulphonic acid

4. Ketones

Q. Detergents are sodium or potassium salts of long chain __________.

1. aldehydes

2. ketones

3. sulphonic acids

4. carboxylic acids

Q.

Which of the following salts when dissolved in water produce hard water?

1. Calcium and Magnesium nitrites

2. Calcium and Magnesium Nitrate

3. Calcium and Magnesium carbonates

4. All salts of Calcium and Magnesium

Q.

Soap forms insoluble precipitates with calcium and magnesium ions present in hard water. True or False?

1. True

2. False