Water Pollution
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CHXI14:ENVIRONMENTAL CHEMISTRY

318639 Correct statements of the following are
(A) Fluorides can be detected by zirconium alizarin S - dye
(B) Harmless level of fluorides in water is upto \({\text{10}}\,\,{\text{ppm}}\)
(C) In Nalgonda technique bleaching powder, lime and alum are added in the same order
(D) Less than \({\text{3}}\,\,{\text{ppm}}\) of fluoride concentration can cause fluorosis

1 A and C
2 C and D
3 B and D
4 A and B
CHXI14:ENVIRONMENTAL CHEMISTRY

318640 Which of the following trophic level has least concentration of toxins deposition?

1 Aquatic plant
2 Small fish
3 Human being
4 Largest fish
CHXI14:ENVIRONMENTAL CHEMISTRY

318641 \(\mathrm{Hg}\) in a sample of water is converted by the action of bacteria into

1 \(\mathrm{Hg}_{2} \mathrm{O}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{Hg}\)
3 \(\mathrm{HgO}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Hg}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318642 Among the following, an incorrect statements is

1 The main reason for river water pollution is industrial and domestic sewage discharge.
2 Surface water contains a lot of organic matter, mineral nutrients and radioactive materials.
3 Oil spill in sea water causes heavy damage to fishery.
4 Oil spill in sea water increases D.O. value.
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CHXI14:ENVIRONMENTAL CHEMISTRY

318639 Correct statements of the following are
(A) Fluorides can be detected by zirconium alizarin S - dye
(B) Harmless level of fluorides in water is upto \({\text{10}}\,\,{\text{ppm}}\)
(C) In Nalgonda technique bleaching powder, lime and alum are added in the same order
(D) Less than \({\text{3}}\,\,{\text{ppm}}\) of fluoride concentration can cause fluorosis

1 A and C
2 C and D
3 B and D
4 A and B
CHXI14:ENVIRONMENTAL CHEMISTRY

318640 Which of the following trophic level has least concentration of toxins deposition?

1 Aquatic plant
2 Small fish
3 Human being
4 Largest fish
CHXI14:ENVIRONMENTAL CHEMISTRY

318641 \(\mathrm{Hg}\) in a sample of water is converted by the action of bacteria into

1 \(\mathrm{Hg}_{2} \mathrm{O}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{Hg}\)
3 \(\mathrm{HgO}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Hg}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318642 Among the following, an incorrect statements is

1 The main reason for river water pollution is industrial and domestic sewage discharge.
2 Surface water contains a lot of organic matter, mineral nutrients and radioactive materials.
3 Oil spill in sea water causes heavy damage to fishery.
4 Oil spill in sea water increases D.O. value.
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CHXI14:ENVIRONMENTAL CHEMISTRY

318639 Correct statements of the following are
(A) Fluorides can be detected by zirconium alizarin S - dye
(B) Harmless level of fluorides in water is upto \({\text{10}}\,\,{\text{ppm}}\)
(C) In Nalgonda technique bleaching powder, lime and alum are added in the same order
(D) Less than \({\text{3}}\,\,{\text{ppm}}\) of fluoride concentration can cause fluorosis

1 A and C
2 C and D
3 B and D
4 A and B
CHXI14:ENVIRONMENTAL CHEMISTRY

318640 Which of the following trophic level has least concentration of toxins deposition?

1 Aquatic plant
2 Small fish
3 Human being
4 Largest fish
CHXI14:ENVIRONMENTAL CHEMISTRY

318641 \(\mathrm{Hg}\) in a sample of water is converted by the action of bacteria into

1 \(\mathrm{Hg}_{2} \mathrm{O}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{Hg}\)
3 \(\mathrm{HgO}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Hg}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318642 Among the following, an incorrect statements is

1 The main reason for river water pollution is industrial and domestic sewage discharge.
2 Surface water contains a lot of organic matter, mineral nutrients and radioactive materials.
3 Oil spill in sea water causes heavy damage to fishery.
4 Oil spill in sea water increases D.O. value.
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CHXI14:ENVIRONMENTAL CHEMISTRY

318639 Correct statements of the following are
(A) Fluorides can be detected by zirconium alizarin S - dye
(B) Harmless level of fluorides in water is upto \({\text{10}}\,\,{\text{ppm}}\)
(C) In Nalgonda technique bleaching powder, lime and alum are added in the same order
(D) Less than \({\text{3}}\,\,{\text{ppm}}\) of fluoride concentration can cause fluorosis

1 A and C
2 C and D
3 B and D
4 A and B
CHXI14:ENVIRONMENTAL CHEMISTRY

318640 Which of the following trophic level has least concentration of toxins deposition?

1 Aquatic plant
2 Small fish
3 Human being
4 Largest fish
CHXI14:ENVIRONMENTAL CHEMISTRY

318641 \(\mathrm{Hg}\) in a sample of water is converted by the action of bacteria into

1 \(\mathrm{Hg}_{2} \mathrm{O}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{Hg}\)
3 \(\mathrm{HgO}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Hg}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318642 Among the following, an incorrect statements is

1 The main reason for river water pollution is industrial and domestic sewage discharge.
2 Surface water contains a lot of organic matter, mineral nutrients and radioactive materials.
3 Oil spill in sea water causes heavy damage to fishery.
4 Oil spill in sea water increases D.O. value.
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