Home
Class 12
BIOLOGY
When domestic sewage mixes with river wa...

When domestic sewage mixes with river water

A

small animals like rats will die after drinking river water

B

the increased microbial activity releases micronutrients such as iron

C

the increased microbial activity uses up dissolved oxygen

D

the river water is still suitable for drinking as impurities are only about `0.1%`.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

A lake with an inflow of domestic sewage rich in organic waste, may result in:

Why sometimes foaming is seen in river water near the place, where sewage water is poured after treatment?

What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on river.

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A,B and C, but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted ? Can you assign the correct label to each assuming the river water is relatively clean ?

Fill in the blanks : The type of colloidal dispersion obtained when egg protein is mixed with water is called ……… colloid.

How can pollution of domestic sewage can be controlled ?

If large quantities of domestic sewage is continuously emptied into a small strem, it leads to

A delta is formed at the meeting point of sea water and river water. Why?