Question

When harmful substances such as sewage, toxic chemicals get mixed with water , then:
A. The water becomes more pure
B. The water get polluted
C. The water becomes clean and clear
D. None of these

Answer 1

Hint: We know that sewage is a waste water which is produced by the human community. Toxic chemicals are chemicals which can damage an organism , It is very dangerous for the living beings.
Sewage and toxic chemicals when mixed with water become very harmful for the living beings.

Complete step by step solution:
 We know very well that whenever harmful substances such as sewage, toxic chemicals get mixed with water it makes the water dirty and non-useful for the living beings . In other words we can say that it increases the pollution level of the water. Sewage and toxic chemicals degrade the water quality of the water body. It contaminates the water body. It is very much dangerous for the living beings because all living beings whether human beings or plants depend on water for life.

So, from the above explanation it is clear to us that the correct answer of the given question is option: B. The water get polluted

Additional information:
 It is important for us to be aware of the water-borne disease. Some of the water borne diseases are cholera, dysentery , jaundice, malaria , typhoid and many more. We should try to minimise the pollution of water and the environment because it can destroy human civilization. We should minimise the use of plastics . We should not let sewage water or toxic chemicals to directly flow into water bodies, we should first treat them in water treatment plants.

Note:
Always remember that the sewage , toxic chemicals and other harmful substances increases the pollution level in water . We should try to avoid them because it is dangerous for the water animals, plants and the entire living being community.