Soft Water

Q.

Write the names and formulas of 10 salts.

Q.

What is the chemical formula of cryolite which is an important mineral of aluminum?

Q. Which of the following options is/are example(s) of soft water?

1. Rain water
2. Sea water
3. Ocean water
4. Distilled water

Q.

What is the other name for the aqueous solution of Potassium permanganate?

Q. Which of the following statement(s) is/are true regarding soft water?

1. Calcium salts are dissolved in it.
2. It forms lather with soap very easily.
3. Rain water is an example of soft water.
4. Magnesium salts are dissolved in it.

Q.

Write the chemical formula of Blue Vitrol.

Q.

The water of rivers, ponds, and lakes is soft.

1. True
2. False

Q.

The underground water is free from dissolved salts of calcium and magnesium.

1. True
2. False

Q. Which of the following are the uses of soft water?

1. Improves digestion
2. Cleaner clothes
3. Purification of sugar
4. Prolonged lifespan of appliances

Q. Saponification is –

1. A process of preparing soap solution by dissolving soap in water
2. A reaction of ester of fatty acid with aqueous sodium or potassium hydroxide
3. A process of precipitating soap from colloidal solution of soap and glycerol
4. An industrial term used in laundry industry for dry cleaning.

Q.

Define soft and hard water

Q. Which of the following is/are the method(s) to soften hard water?

1. Boiling
2. Ion exchange process
3. Cooling
4. Addition of washing soda

Q.

List two disadvantages of Hard Water.

Q.

What type of water is responsible for mineral build up?

1. Soft water

2. Deep bore water

3. Hard water

4. Tap water

Q. If 100g of salt is mixed with 100g of sand, what happens to the taste of the salt crystals?

1. Changes permanently.
2. Changes temporarily and converts back after some time.
3. Doesn't change.
4. not enough data to conclude.

Q. Which of the following options is/are example(s) of soft water?

1. Rain water
2. Sea water
3. Ocean water
4. Distilled water

Q.

Give an example of salt other than table salt

Q.

Addition of which of the following during manufacturing results in blue colour of the glass?

1. Nickel Salt

2. Cobalt Salt

3. Manganese Salt

4. None of these

Q.

Zeolites are chemically

1. Silicates

2. Potassium silicates

3. Aluminosilicates

4. Pyro silicates

Q. Washing soda is used to soften hard water.

1. True
2. False

Q.

Permutit is the name given to:

1. silicate of calcium and sodium

2. hydrated silicate of aluminium and sodium

3. anhydrous silicates of calcium and magnesium

4. silicates of calcium and sodium

Q. Which of the following is/are the method(s) to soften hard water?

1. Boiling
2. Ion exchange process
3. Cooling
4. Addition of washing soda

Q. Which of the following statement(s) is/are true regarding soft water?

1. Calcium salts are dissolved in it.
2. It forms lather with soap very easily.
3. Rain water is an example of soft water.
4. Magnesium salts are dissolved in it.

Q.

Zeolites are chemically

1. Aluminosilicates

2. Pyro silicates

3. Silicates

4. Potassium silicates