Boiling Water

Q.

Insoluble impurities in a sample of water can be removed by

1. Boiling

2. Filtration

3. Distillation

4. Adding chlorine

Q.

5. Name the process by which saline water can be made potable ?

Q.

Can we consume distilled water

Q.

Tick(√) the correct alternative from the given options for the following statement:

Chlorination of water is done-

1. To kill the germs

2. To remove this suspended impurity

3. To remove the dissolved impurities

4. None of the above

Q. Name the process of filtering in which a semi-permeable membrane separates the water from contaminants.

Q. ______ is a commonly used chemical method for purifying water.

1. Flourination
2. Chlorination
3. Bromination
4. Boiling

Q. What is the role of chlorine in water purification?

Q.

Boiling purifies water because:

1. it rises the temperature of water

2. it increases the pressure of water

3. it lowers the volume of water

4. it decreases the temperature of water

Q.

The chemical method used for the purification of water is:

1. chlorination
2. boiling
3. Both A and B
4. None of the above

Q. Sometimes it may be necessary to disinfect water with chemicals like ______ before releasing it into the distribution system.

1. chlorine
2. ozone
3. Both A and B
4. none of the above

Q. What is water purification?

1. Removing biological contaminants
2. Removing undesirable chemicals
3. Both A and B
4. Removing minerals

Q. Which of the following methods is not a household method used for making drinking water safe?

1. Distillation
2. Boiling
3. Filtration
4. Chlorination

Q.

Drinking water can be filtered by:

1. sedimentation
2. filtration
3. chlorination
4. All of the above

Q. Compound used to remove bacteria from water is:

1. washing soda
2. baking soda
3. bleaching powder
4. alum

Q. During softening of water, boiling is followed by:

1. evaporation
2. distillation
3. filtration
4. freezing

Q.

Name the nonmetal used in the water purifier?

Q. Water must be purified before it is suitable for use in the home. Which processes are used to remove solid impurities and to kill bacteria?

1. To remove solid impurities - chlorination, to kill bacteria - chlorination
2. To remove solid impurities - chlorination, to kill bacteria - filtration
3. To remove solid impurities - filtration, to kill bacteria - chlorination
4. To remove solid impurities - filtration, to kill bacteria - filtration

Q. Boiling kills the germs present in the _____.

1. Air
2. Water
3. Body
4. None of the above

Q. The process of removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water is known as:

1. Decantation
2. Water purification
3. Filtration
4. Sedimentation

Q. Which of the following methods can be used for purification of water?

1. Physical treatment
2. Removal of suspended impurities
3. Chemical treatment
4. Both B & C

Q. Which method of water purification does not kill microorganisms?

1. Filtration
2. Boiling
3. Chlorination
4. Distillation

Q.

Sterilization of water by addition of chlorine for treatment against bacterial infection is known as:

1. filtering
2. sedimentation
3. chlorination
4. All of the above

Q. Explain three methods of removing germs from natural water.

Q. _____ can be added to water to kill certain bacteria.

1. Sulphur
2. Chlorine
3. Sodium
4. Phosphorus

Q. How water can be purified?

Q. Water is often treated with chlorine to ________.

1. kill germs
2. increase oxygen content
3. remove suspended particles
4. remove hardness

Q. Water can be purified by adding:

1. baking soda
2. chlorine
3. sodium chloride
4. calcium