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 |
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. |
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 |
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 |
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. |