Water-Types of Water Pollution (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 1 - 3 of 3

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Question number: 1

» Water » Types of Water Pollution

Appeared in Year: 2015

MCQ▾

Question

If a phosphorous limited lake having surface area equal to 80×106m2 is fed by stream with flow rate 20m3s that has phosphorous concentration of 0.01mgL , then the phosphorous loading from the incoming stream is (June)

Choices

Choice (4) Response
a.

0.2gs

b.

0.6gs

c.

4.0gs

d.

0.4gs

Question number: 2

» Water » Types of Water Pollution

Appeared in Year: 2015

MCQ▾

Question

Filamentous Cyanobacteria differentiate 5 to 10 % of their vegetative cells into heterocysts. Heterocysts are characterized by:

(I) Thick cell wall

(II) Only PSI activity

(III) Nitrogenase activity

Choose the correct answer: (June)

Choices

Choice (4) Response
a.

(I) and (III) only

b.

(II) and (III) only

c.

(I) only

d.

(I), (II) and (III)

Question number: 3

» Water » Types of Water Pollution

Appeared in Year: 2011

MCQ▾

Question

Which of the following steps can be used to raise the assimilative capacity of natural systems? - (December)

Choices

Choice (4) Response
a.

Avoid concentration of polluting industry at a particular place.

b.

Turn barren land into eutrophic system.

c. Question does not provide sufficient data or is vague
d. None of the above

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