Purification of Water Quiz - CBSE Class 6 Science

Free practice quiz: Purification of Water (CBSE Class 6 Science). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 6 Science practice quiz has 19 multiple-choice questions on Purification of Water, and 19 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the main reason for purifying water?

   1. To make it taste better
   2. To remove harmful substances
   3. To change its color
   4. To increase its temperature
   Show answer

   Answer: B. To remove harmful substances

   The main reason for purifying water is to remove harmful substances that can be dangerous to health.

2. Which of the following is NOT a method of water purification?

   1. Chlorination
   2. Filtration
   3. Evaporation
   4. Condensation
   Show answer

   Answer: D. Condensation

   Condensation is a process of changing gas to liquid, not a method used for purifying water.

3. What is the main purpose of using activated carbon in water purification?

   1. To change water color
   2. To absorb impurities
   3. To heat water
   4. To sweeten water
   Show answer

   Answer: B. To absorb impurities

   Activated carbon is used to absorb impurities and improve the taste and odor of water.

4. In the process of distillation, if 15 liters of impure water yield 12 liters of distilled water, how much water has been removed?

   1. 3 liters
   2. 5 liters
   3. 2 liters
   4. 4 liters
   Show answer

   Answer: A. 3 liters

   In the distillation process, the difference in initial and final volumes gives us the water removed: 15 liters - 12 liters = 3 liters.

5. What is a likely consequence of not purifying water before drinking?

   1. Increased taste
   2. Health problems
   3. Higher temperature
   4. Better hydration
   Show answer

   Answer: B. Health problems

   Not purifying water can lead to health problems due to harmful microorganisms and toxins present in impure water.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which method is commonly used for purifying drinking water?
2. What is filtration in water purification?
3. What is the simplest method of purification of water that can remove most bacteria?
4. Which substance is commonly used in water treatment to kill bacteria?
5. What does sedimentation refer to in water purification?
6. In reverse osmosis, what is being filtered out from water?
7. Which of the following is a disadvantage of boiling water for purification?
8. If 10 liters of water are boiled for 5 minutes, how many liters of pure water can be consumed if the evaporation rate is 2 liters per hour?
9. What is the role of a sand filter in water purification?
10. If a water purification plant treats 200 liters of water and removes 30% of impurities, how many liters of impurities will be removed?
11. What is the primary goal of using ultraviolet light in water purification?
12. Which of the following statements about waterborne diseases is true?
13. What is one key benefit of community water purification systems?
14. In a water treatment plant, if 500 liters of impure water contain 50 liters of impurities, what is the percentage of impurities in the water?

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