EASY
Earn 100

What are the effects of water pollution?

Important Questions on Environmental Issue

EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
One of the following is called as 'Terror of Bengal'.
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
When huge amount of sewage is dumped into a river, its B.O.D, will
HARD
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control

Two types of aquatic organisms in a lake show specific growth patterns as shown, in a brief period of time. The lake is adjacent to an agricultural land extensively supplied with fertilizers.

Name the organisms depicting the patterns A and B.

Question Image

MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Which one of the following impurities is easiest to remove from wastewater?
HARD
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control

Study the graph. Explain how is Oxygen concentration affected the river when sewage is discharged into it.

Question Image

EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Secondary sewage treatment is mainly a
HARD
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
List any four factors which determine the amount of dissolved oxygen in the water. Explain in brief the harmful effect of nitrate, fluoride and arsenic salt in groundwater of humans.
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
A dental disease characterized by mottling of teeth is due to the presence of certain chemical element in drinking water. Which of the following is that element ?
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Which one of the following organisms is used as an indicator of water quality?
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
 Match the following and choose the correct option.
Column I Column II
A.    Environment Protection Act  (i) 1974
B.    Air Prevention & Control of Pollution Act (ii) 1987
C.    Water Act   (iii) 1986
D.    Amendment of Air Act to include noise as an air pollutant (iv) 1981
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants could you expect in F1 -generation?
HARD
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control

Explain giving results the cause of the appearance of peaks 'a' and 'b' in the graph.
Question Image

EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Which one of the following is not a bioindicator of water pollution?
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
How did a citizen group called friends of Areata Marsh, Arcata, California, USA helped to improve the water quality of the marshland using integrated wastewater treatment? Explain in four steps.
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
In Minamata Bay Japan, the animals which remained free from Minamata disease, are
MEDIUM
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Mention the information that health workers derive by measuring BOD of a water body.
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Which one of the following diseases is not caused due to contamination of water?
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
One of the most polluted river in Maharashtra is
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
The most common indicator organism that represents polluted water is:
EASY
Biology>Ecology and Environment>Environmental Issue>Water Pollution and its Control
Which of the following is not used for disinfection of drinking water ?