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Consider the following observation. (I...

Consider the following observation.
(I) `pH` or rain water is `5.6`
(II) Amount of `CO_(2)` in the atmosphere is `0.03%`
(III) Biochemical oxygen demand is 10 ppm
(IV) Eutrophication

A

Both I and III

B

Both I and IV

C

Both III and IV

D

I,III, and IV

Text Solution

Verified by Experts

The correct Answer is:
C
(I)`pH` of water = `5.5` means it is less acidic and contains dissolved `CO_(2)`. It is not polluted water .
(II) `CO_(2) =0.03%` indicated very less pollution.
(III) `BOD = 10.00` ppm means polluted water.
(IV) Eutrophication is the process by which over a period of few years, good quality water bodies are rendered useless as a result of overnutrition due to phosphate nitrates and biomass. Thus, this indicates polluted water.
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Which of the following is/are polluted? (a) Rain water, with pH 5.6 (b) The atmosphere contains 0.03 % CO_(2) (c) River water with a COD value 10 ppm (d) Pond water with phenomenon of eutrophication. The correct answer is

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Name two main acids present in acid rain. From where do these acids come in acid rain ?

Convert each of the following as a mixed fraction: (i) 5.6 (ii) 12.25 (iii) 6.004 (iv) 4.625

Rearrange the following (I to IV) in the order of increasing masses : (I) 0.5 mole of O_(3)" "(II) 0.5 gm atom of oxygen (III) 3.011 xx 10^(23) molecules of O_(2) " " (IV) 5.6 litre of CO_(2) at STP

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. What is PAN?

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Why does the rain water normally have a pH of about 5.6 ?

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Why is acid rain considered as a threat to Taj Mahal in Agra ?

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Name three gases which are responsible for greenhouse effect.

What is the mass of (i) 1 mole of water (ii) 0.5 mole of CO_(2) (iii) 2.5 moles of Cl_(2) ?

Convert the following fractions into percentages: (i) (1)/(2) (ii) (3)/(4) (iii) (4)/(5) (iv) (7)/(8)

A2Z-ENVIRONMENTAL CHEMISTRY-Section D - Chapter End Test
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  2. When polluted air is scrubbed with H(2)SO(4) solution,

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  3. Negative soil pollutant is

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  4. Which of the following chemical, harmful to ozone , released by chloro...

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  5. Which of the following statement about sewage treatment is false?

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  6. Oxides of sulphur and nitrogen can be removed by scrubbing with

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  7. Which of the following in not an example of green chemistry?

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  8. Which of the following is the coldest region of atmosphere

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  9. Most hazardous metal pollutant of automobile exhausts is :

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  10. NO and H(2)S both the pollutants of air. NO is H(2)S remover while H(2...

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  11. The region which is greatly affected by air pollution is

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  12. Classical smog occurs in places of :

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  13. Which of the following is not a herbicide?

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  14. Which of the following is not involved in the formation of photochemic...

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  15. Which is not the constituent of photochemical smog?

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  16. DDT is

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  17. Smog can be controlled by

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  18. Domestic waste mostly constitute:

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  19. The gas leaked from a stronge tank of the Union Carbide plant in Bhopa...

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  20. Which is not correct statement for classical smog?

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  21. Which of the following is the primary precursor of photochemical smog?

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