Water [NTA-NET (UGC-NET) Environmental Science (89)]: Questions 1 - 5 of 45

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Question 1

Appeared in Year: 2018

Question MCQ▾

Temporary hardness is caused by: (July)

Choices

Choice (4)Response

a.

Magnesium Sulfate

b.

Calcium Sulfate

c.

Magnesium carbonate

d.

Magnesium chloride

Edit

Question 2

Appeared in Year: 2015

Question MCQ▾

If a phosphorous limited lake having surface area equal to is fed by stream with flow rate that has phosphorous concentration of , then the phosphorous loading from the incoming stream is (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 3

Appeared in Year: 2019

Question MCQ▾

Artesian Well is (December)

Choices

Choice (4)Response

a.

Water underneath the surface having sufficient hydraulic pressure

b.

Water underneath the surface having very low hydraulic pressure

c.

Artificial well

d.

Natural well is fault planes

Edit

Question 4

Appeared in Year: 2015

Question MCQ▾

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) only

b.

(II) and (III) only

c.

(I) , (II) and (III)

d.

(I) and (III) only

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Question 5

Appeared in Year: 2017

Question MCQ▾

Identify the incorrect statement regarding water purification by coagulation. (January)

Choices

Choice (4)Response

a.

When alum is added it works as a coagulant.

b.

Suspended particles due to similar charge repel each other.

c.

Particles suspended in water are in colloidal form.

d.

Suspended particles carry a positive charge.

Edit