Water Pollution
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CHXI14:ENVIRONMENTAL CHEMISTRY

318574 COD value determination is based on

1 Chemical oxidation of inorganic substances
2 Chemical reduction of organic substances
3 Chemical oxidation of organic sustances
4 Microbial oxidation of organic sustances
CHXI14:ENVIRONMENTAL CHEMISTRY

318575 In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise \(10 \mathrm{mg}\) of carbon is

1 \({\text{2}}{\text{.67}}\,\,{\text{mg}}\)
2 \({\text{26}}{\text{.7}}\,\,{\text{mg}}\)
3 \({\text{5}}\,\,{\text{gr}}\)
4 \({\text{logr}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318576 Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than \({\text{5}}\,\,{\text{ppm}}\) indicates a water sample to be .

1 rich in dissolved oxygen
2 poor in dissolved oxygen
3 highly polluted
4 not suitable for aquatic life
NCERT Exemplar
CHXI14:ENVIRONMENTAL CHEMISTRY

318577 COD is expressed in

1 gm per litre of oxyen
2 mg of oxygen per 1000 litres
3 milli equivalents of oxygen per litre
4 gm of oxygen per \(1000 \mathrm{~mL}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318578 A sample of pond water containing \(20 \mathrm{mg}\) of organic matter requires \(16 \mathrm{mg}\) of dissolved oxygen. (Pond water contains \(10 \mathrm{mg}\) of organic matter per 2 litres). It's BOD is

1 \({\text{4000}}\,\,{\text{ppm}}\)
2 \({\text{400}}\,\,{\text{ppm}}\)
3 \({\text{4}}\,\,{\text{ppm}}\)
4 \({\text{40}}\,\,{\text{ppm}}\)
NEET DIGITAL LIBRARY
CHXI14:ENVIRONMENTAL CHEMISTRY

318574 COD value determination is based on

1 Chemical oxidation of inorganic substances
2 Chemical reduction of organic substances
3 Chemical oxidation of organic sustances
4 Microbial oxidation of organic sustances
CHXI14:ENVIRONMENTAL CHEMISTRY

318575 In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise \(10 \mathrm{mg}\) of carbon is

1 \({\text{2}}{\text{.67}}\,\,{\text{mg}}\)
2 \({\text{26}}{\text{.7}}\,\,{\text{mg}}\)
3 \({\text{5}}\,\,{\text{gr}}\)
4 \({\text{logr}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318576 Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than \({\text{5}}\,\,{\text{ppm}}\) indicates a water sample to be .

1 rich in dissolved oxygen
2 poor in dissolved oxygen
3 highly polluted
4 not suitable for aquatic life
NCERT Exemplar
CHXI14:ENVIRONMENTAL CHEMISTRY

318577 COD is expressed in

1 gm per litre of oxyen
2 mg of oxygen per 1000 litres
3 milli equivalents of oxygen per litre
4 gm of oxygen per \(1000 \mathrm{~mL}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318578 A sample of pond water containing \(20 \mathrm{mg}\) of organic matter requires \(16 \mathrm{mg}\) of dissolved oxygen. (Pond water contains \(10 \mathrm{mg}\) of organic matter per 2 litres). It's BOD is

1 \({\text{4000}}\,\,{\text{ppm}}\)
2 \({\text{400}}\,\,{\text{ppm}}\)
3 \({\text{4}}\,\,{\text{ppm}}\)
4 \({\text{40}}\,\,{\text{ppm}}\)
Join With Us for More Updates
CHXI14:ENVIRONMENTAL CHEMISTRY

318574 COD value determination is based on

1 Chemical oxidation of inorganic substances
2 Chemical reduction of organic substances
3 Chemical oxidation of organic sustances
4 Microbial oxidation of organic sustances
CHXI14:ENVIRONMENTAL CHEMISTRY

318575 In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise \(10 \mathrm{mg}\) of carbon is

1 \({\text{2}}{\text{.67}}\,\,{\text{mg}}\)
2 \({\text{26}}{\text{.7}}\,\,{\text{mg}}\)
3 \({\text{5}}\,\,{\text{gr}}\)
4 \({\text{logr}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318576 Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than \({\text{5}}\,\,{\text{ppm}}\) indicates a water sample to be .

1 rich in dissolved oxygen
2 poor in dissolved oxygen
3 highly polluted
4 not suitable for aquatic life
NCERT Exemplar
CHXI14:ENVIRONMENTAL CHEMISTRY

318577 COD is expressed in

1 gm per litre of oxyen
2 mg of oxygen per 1000 litres
3 milli equivalents of oxygen per litre
4 gm of oxygen per \(1000 \mathrm{~mL}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318578 A sample of pond water containing \(20 \mathrm{mg}\) of organic matter requires \(16 \mathrm{mg}\) of dissolved oxygen. (Pond water contains \(10 \mathrm{mg}\) of organic matter per 2 litres). It's BOD is

1 \({\text{4000}}\,\,{\text{ppm}}\)
2 \({\text{400}}\,\,{\text{ppm}}\)
3 \({\text{4}}\,\,{\text{ppm}}\)
4 \({\text{40}}\,\,{\text{ppm}}\)
For More Updates join with Us
CHXI14:ENVIRONMENTAL CHEMISTRY

318574 COD value determination is based on

1 Chemical oxidation of inorganic substances
2 Chemical reduction of organic substances
3 Chemical oxidation of organic sustances
4 Microbial oxidation of organic sustances
CHXI14:ENVIRONMENTAL CHEMISTRY

318575 In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise \(10 \mathrm{mg}\) of carbon is

1 \({\text{2}}{\text{.67}}\,\,{\text{mg}}\)
2 \({\text{26}}{\text{.7}}\,\,{\text{mg}}\)
3 \({\text{5}}\,\,{\text{gr}}\)
4 \({\text{logr}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318576 Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than \({\text{5}}\,\,{\text{ppm}}\) indicates a water sample to be .

1 rich in dissolved oxygen
2 poor in dissolved oxygen
3 highly polluted
4 not suitable for aquatic life
NCERT Exemplar
CHXI14:ENVIRONMENTAL CHEMISTRY

318577 COD is expressed in

1 gm per litre of oxyen
2 mg of oxygen per 1000 litres
3 milli equivalents of oxygen per litre
4 gm of oxygen per \(1000 \mathrm{~mL}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318578 A sample of pond water containing \(20 \mathrm{mg}\) of organic matter requires \(16 \mathrm{mg}\) of dissolved oxygen. (Pond water contains \(10 \mathrm{mg}\) of organic matter per 2 litres). It's BOD is

1 \({\text{4000}}\,\,{\text{ppm}}\)
2 \({\text{400}}\,\,{\text{ppm}}\)
3 \({\text{4}}\,\,{\text{ppm}}\)
4 \({\text{40}}\,\,{\text{ppm}}\)
NEET DIGITAL LIBRARY
CHXI14:ENVIRONMENTAL CHEMISTRY

318574 COD value determination is based on

1 Chemical oxidation of inorganic substances
2 Chemical reduction of organic substances
3 Chemical oxidation of organic sustances
4 Microbial oxidation of organic sustances
CHXI14:ENVIRONMENTAL CHEMISTRY

318575 In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise \(10 \mathrm{mg}\) of carbon is

1 \({\text{2}}{\text{.67}}\,\,{\text{mg}}\)
2 \({\text{26}}{\text{.7}}\,\,{\text{mg}}\)
3 \({\text{5}}\,\,{\text{gr}}\)
4 \({\text{logr}}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318576 Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than \({\text{5}}\,\,{\text{ppm}}\) indicates a water sample to be .

1 rich in dissolved oxygen
2 poor in dissolved oxygen
3 highly polluted
4 not suitable for aquatic life
NCERT Exemplar
CHXI14:ENVIRONMENTAL CHEMISTRY

318577 COD is expressed in

1 gm per litre of oxyen
2 mg of oxygen per 1000 litres
3 milli equivalents of oxygen per litre
4 gm of oxygen per \(1000 \mathrm{~mL}\)
CHXI14:ENVIRONMENTAL CHEMISTRY

318578 A sample of pond water containing \(20 \mathrm{mg}\) of organic matter requires \(16 \mathrm{mg}\) of dissolved oxygen. (Pond water contains \(10 \mathrm{mg}\) of organic matter per 2 litres). It's BOD is

1 \({\text{4000}}\,\,{\text{ppm}}\)
2 \({\text{400}}\,\,{\text{ppm}}\)
3 \({\text{4}}\,\,{\text{ppm}}\)
4 \({\text{40}}\,\,{\text{ppm}}\)