Water Pollution
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CHXI14:ENVIRONMENTAL CHEMISTRY

318579 COD of a water sample is 8ppm the weight of acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) required to oxidise the organic matter present in one litre of water sample is

1 \({\text{98}}\,\,{\text{mg}}\)
2 \({\text{49}}\,\,{\text{mg}}\)
3 \({\text{196}}\,\,{\text{mg}}\)
4 \({\text{98}}\,\,{\text{g}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318580 In a polluted lake, the index of pollution is

1 BOD and Daphnia
2 DO and Artemisia
3 presence of frogs
4 diatoms larvae
CHXI14:ENVIRONMENTAL CHEMISTRY

318581 BOD stands for:

1 Biochemical Oxidation Demand
2 Biological Oxygen Demand
3 Biochemical Oxygen Demand
4 Bacterial Oxidation Demand
JEE - 2016
CHXI14:ENVIRONMENTAL CHEMISTRY

318582 The extent of pollution of a sample of water is generally indicated by

1 the number of cholera victims
2 the amount of toxic substances fromed by aerobic decomposition.
3 the number of gm of \(\mathrm{O}_{2}\) required per litre of \(\mathrm{H}_{2} \mathrm{O}\)
4 ratio of \(\dfrac{\text { (the no.of } \mathrm{O}_{2} \text { consumed) }}{(\text { no.of litres of the sample of water used) }}\)
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CHXI14:ENVIRONMENTAL CHEMISTRY

318579 COD of a water sample is 8ppm the weight of acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) required to oxidise the organic matter present in one litre of water sample is

1 \({\text{98}}\,\,{\text{mg}}\)
2 \({\text{49}}\,\,{\text{mg}}\)
3 \({\text{196}}\,\,{\text{mg}}\)
4 \({\text{98}}\,\,{\text{g}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318580 In a polluted lake, the index of pollution is

1 BOD and Daphnia
2 DO and Artemisia
3 presence of frogs
4 diatoms larvae
CHXI14:ENVIRONMENTAL CHEMISTRY

318581 BOD stands for:

1 Biochemical Oxidation Demand
2 Biological Oxygen Demand
3 Biochemical Oxygen Demand
4 Bacterial Oxidation Demand
JEE - 2016
CHXI14:ENVIRONMENTAL CHEMISTRY

318582 The extent of pollution of a sample of water is generally indicated by

1 the number of cholera victims
2 the amount of toxic substances fromed by aerobic decomposition.
3 the number of gm of \(\mathrm{O}_{2}\) required per litre of \(\mathrm{H}_{2} \mathrm{O}\)
4 ratio of \(\dfrac{\text { (the no.of } \mathrm{O}_{2} \text { consumed) }}{(\text { no.of litres of the sample of water used) }}\)
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CHXI14:ENVIRONMENTAL CHEMISTRY

318579 COD of a water sample is 8ppm the weight of acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) required to oxidise the organic matter present in one litre of water sample is

1 \({\text{98}}\,\,{\text{mg}}\)
2 \({\text{49}}\,\,{\text{mg}}\)
3 \({\text{196}}\,\,{\text{mg}}\)
4 \({\text{98}}\,\,{\text{g}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318580 In a polluted lake, the index of pollution is

1 BOD and Daphnia
2 DO and Artemisia
3 presence of frogs
4 diatoms larvae
CHXI14:ENVIRONMENTAL CHEMISTRY

318581 BOD stands for:

1 Biochemical Oxidation Demand
2 Biological Oxygen Demand
3 Biochemical Oxygen Demand
4 Bacterial Oxidation Demand
JEE - 2016
CHXI14:ENVIRONMENTAL CHEMISTRY

318582 The extent of pollution of a sample of water is generally indicated by

1 the number of cholera victims
2 the amount of toxic substances fromed by aerobic decomposition.
3 the number of gm of \(\mathrm{O}_{2}\) required per litre of \(\mathrm{H}_{2} \mathrm{O}\)
4 ratio of \(\dfrac{\text { (the no.of } \mathrm{O}_{2} \text { consumed) }}{(\text { no.of litres of the sample of water used) }}\)
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CHXI14:ENVIRONMENTAL CHEMISTRY

318579 COD of a water sample is 8ppm the weight of acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) required to oxidise the organic matter present in one litre of water sample is

1 \({\text{98}}\,\,{\text{mg}}\)
2 \({\text{49}}\,\,{\text{mg}}\)
3 \({\text{196}}\,\,{\text{mg}}\)
4 \({\text{98}}\,\,{\text{g}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318580 In a polluted lake, the index of pollution is

1 BOD and Daphnia
2 DO and Artemisia
3 presence of frogs
4 diatoms larvae
CHXI14:ENVIRONMENTAL CHEMISTRY

318581 BOD stands for:

1 Biochemical Oxidation Demand
2 Biological Oxygen Demand
3 Biochemical Oxygen Demand
4 Bacterial Oxidation Demand
JEE - 2016
CHXI14:ENVIRONMENTAL CHEMISTRY

318582 The extent of pollution of a sample of water is generally indicated by

1 the number of cholera victims
2 the amount of toxic substances fromed by aerobic decomposition.
3 the number of gm of \(\mathrm{O}_{2}\) required per litre of \(\mathrm{H}_{2} \mathrm{O}\)
4 ratio of \(\dfrac{\text { (the no.of } \mathrm{O}_{2} \text { consumed) }}{(\text { no.of litres of the sample of water used) }}\)
For More Updates join with Us