EASY
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Microbes are killed in water purification system by using .

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Important Questions on Water

MEDIUM
Physical Science>Chemistry>Water>Purification of Water
Chlorination is commonly done by using: 
MEDIUM
Physical Science>Chemistry>Water>Purification of Water
Which of the following can be used to disinfect the clean water in a sewage treatment plant before releasing it into the distribution system? 
A. Iodine
B. Ozone
C. Oxygen
D. Chlorine
EASY
Physical Science>Chemistry>Water>Purification of Water
The aerobic bacteria can be grown in clarified water by
MEDIUM
Physical Science>Chemistry>Water>Purification of Water

Which of the following method is used as germicidal in modern times for drinking water?

 

 

EASY
Physical Science>Chemistry>Water>Purification of Water
The process in which alum is added to water that causes dirt and other particles to stick together is known as 
MEDIUM
Physical Science>Chemistry>Water>Purification of Water

Study the following statements about ozone:

(a) It is essential for the breathing of living organisms.

(b) It is used to disinfect water.

(c) It absorbs ultraviolet rays.

(d) Its proportion of the air is about 3%.

Which of these statements is correct?

MEDIUM
Physical Science>Chemistry>Water>Purification of Water
To control water pollution, we should
EASY
Physical Science>Chemistry>Water>Purification of Water
Adding chlorine to the water to kill disease germs is called _____.
EASY
Physical Science>Chemistry>Water>Purification of Water
Pick from the following one chemical used to disinfect water.
MEDIUM
Physical Science>Chemistry>Water>Purification of Water
Select the activity which will have no harmful effects on the quality of water.
MEDIUM
Physical Science>Chemistry>Water>Purification of Water
In this process of purification of water, bleaching powder is added.
MEDIUM
Physical Science>Chemistry>Water>Purification of Water
Which statement defines aeration?
MEDIUM
Physical Science>Chemistry>Water>Purification of Water
Impurities from water can be separated by:
EASY
Physical Science>Chemistry>Water>Purification of Water
The method of prevention of water pollution from an industrial perspective is:
MEDIUM
Physical Science>Chemistry>Water>Purification of Water

_____ is added to kill germs in the water.

MEDIUM
Physical Science>Chemistry>Water>Purification of Water

Which of the following statements about ozone are correct? 

A. It is essential for breathing of living organisms.

B. It is used to disinfect water. 
C. It absorbs ultraviolet rays. 
D. Its proportion in air is about 3%.

EASY
Physical Science>Chemistry>Water>Purification of Water
During the aeration of clarified water _____ bacteria grow.
 
EASY
Physical Science>Chemistry>Water>Purification of Water
We should avoid detergents which are _____.  (non-biodegradable/biodegradable)
EASY
Physical Science>Chemistry>Water>Purification of Water
Water is disinfected using
MEDIUM
Physical Science>Chemistry>Water>Purification of Water

Which one of these is a biological process of treating wastewater?