343932
Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analyzing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted?
1 0.06 mg/L
2 6 mg/L
3 0.16 mg/L
4 0.6 mg/L
Explanation:
More the BOD , means more pollution
KCET - 2023
BIOXII10: MICROBES IN HUMAN WELFARE
343945
Activated sludge should have the ability to settle quickly so that it can:
1 Be rapidly pumped back from sedimentation tank to aeration tank
2 Absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
3 Be discarded and anaerobically digested
4 Absorb colloidal organic matter.
Explanation:
Be discarded and anaerobically digested
NCERT Exemplar
BIOXII10: MICROBES IN HUMAN WELFARE
343944
STP treatment is carried out in two stages. They are
1 Biological treatment
2 Secondary treatment
3 Primary treatment
4 All of them
Explanation:
STP treatment is carried out in two stages. They are 1. Primary treatment, 2. Secondary treatment/ Biological treatment.
BIOXII10: MICROBES IN HUMAN WELFARE
343922
Biological oxygen demand is a measure of
1 Industrial wasted poured into water bodies.
2 Extent to which water is polluted with organic compounds.
3 Amount of oxygen needed by green plants during night.
4 Amount of carbon monoxide inseparably combined with haemoglobin
Explanation:
Biochemical oxygen demand is measure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample over a specific time period.
BIOXII10: MICROBES IN HUMAN WELFARE
343923
What would happen if oxygen availability to activated sludge flocs is reduced?
1 It will slow down the rate of degradation of organic matter
2 The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
3 Flocs would increase in size as anaerobic bacteria would grow around flocs.
4 Protozoa would grow in large numbers.
Explanation:
The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
343932
Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analyzing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted?
1 0.06 mg/L
2 6 mg/L
3 0.16 mg/L
4 0.6 mg/L
Explanation:
More the BOD , means more pollution
KCET - 2023
BIOXII10: MICROBES IN HUMAN WELFARE
343945
Activated sludge should have the ability to settle quickly so that it can:
1 Be rapidly pumped back from sedimentation tank to aeration tank
2 Absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
3 Be discarded and anaerobically digested
4 Absorb colloidal organic matter.
Explanation:
Be discarded and anaerobically digested
NCERT Exemplar
BIOXII10: MICROBES IN HUMAN WELFARE
343944
STP treatment is carried out in two stages. They are
1 Biological treatment
2 Secondary treatment
3 Primary treatment
4 All of them
Explanation:
STP treatment is carried out in two stages. They are 1. Primary treatment, 2. Secondary treatment/ Biological treatment.
BIOXII10: MICROBES IN HUMAN WELFARE
343922
Biological oxygen demand is a measure of
1 Industrial wasted poured into water bodies.
2 Extent to which water is polluted with organic compounds.
3 Amount of oxygen needed by green plants during night.
4 Amount of carbon monoxide inseparably combined with haemoglobin
Explanation:
Biochemical oxygen demand is measure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample over a specific time period.
BIOXII10: MICROBES IN HUMAN WELFARE
343923
What would happen if oxygen availability to activated sludge flocs is reduced?
1 It will slow down the rate of degradation of organic matter
2 The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
3 Flocs would increase in size as anaerobic bacteria would grow around flocs.
4 Protozoa would grow in large numbers.
Explanation:
The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
343932
Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analyzing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted?
1 0.06 mg/L
2 6 mg/L
3 0.16 mg/L
4 0.6 mg/L
Explanation:
More the BOD , means more pollution
KCET - 2023
BIOXII10: MICROBES IN HUMAN WELFARE
343945
Activated sludge should have the ability to settle quickly so that it can:
1 Be rapidly pumped back from sedimentation tank to aeration tank
2 Absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
3 Be discarded and anaerobically digested
4 Absorb colloidal organic matter.
Explanation:
Be discarded and anaerobically digested
NCERT Exemplar
BIOXII10: MICROBES IN HUMAN WELFARE
343944
STP treatment is carried out in two stages. They are
1 Biological treatment
2 Secondary treatment
3 Primary treatment
4 All of them
Explanation:
STP treatment is carried out in two stages. They are 1. Primary treatment, 2. Secondary treatment/ Biological treatment.
BIOXII10: MICROBES IN HUMAN WELFARE
343922
Biological oxygen demand is a measure of
1 Industrial wasted poured into water bodies.
2 Extent to which water is polluted with organic compounds.
3 Amount of oxygen needed by green plants during night.
4 Amount of carbon monoxide inseparably combined with haemoglobin
Explanation:
Biochemical oxygen demand is measure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample over a specific time period.
BIOXII10: MICROBES IN HUMAN WELFARE
343923
What would happen if oxygen availability to activated sludge flocs is reduced?
1 It will slow down the rate of degradation of organic matter
2 The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
3 Flocs would increase in size as anaerobic bacteria would grow around flocs.
4 Protozoa would grow in large numbers.
Explanation:
The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
343932
Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analyzing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted?
1 0.06 mg/L
2 6 mg/L
3 0.16 mg/L
4 0.6 mg/L
Explanation:
More the BOD , means more pollution
KCET - 2023
BIOXII10: MICROBES IN HUMAN WELFARE
343945
Activated sludge should have the ability to settle quickly so that it can:
1 Be rapidly pumped back from sedimentation tank to aeration tank
2 Absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
3 Be discarded and anaerobically digested
4 Absorb colloidal organic matter.
Explanation:
Be discarded and anaerobically digested
NCERT Exemplar
BIOXII10: MICROBES IN HUMAN WELFARE
343944
STP treatment is carried out in two stages. They are
1 Biological treatment
2 Secondary treatment
3 Primary treatment
4 All of them
Explanation:
STP treatment is carried out in two stages. They are 1. Primary treatment, 2. Secondary treatment/ Biological treatment.
BIOXII10: MICROBES IN HUMAN WELFARE
343922
Biological oxygen demand is a measure of
1 Industrial wasted poured into water bodies.
2 Extent to which water is polluted with organic compounds.
3 Amount of oxygen needed by green plants during night.
4 Amount of carbon monoxide inseparably combined with haemoglobin
Explanation:
Biochemical oxygen demand is measure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample over a specific time period.
BIOXII10: MICROBES IN HUMAN WELFARE
343923
What would happen if oxygen availability to activated sludge flocs is reduced?
1 It will slow down the rate of degradation of organic matter
2 The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
3 Flocs would increase in size as anaerobic bacteria would grow around flocs.
4 Protozoa would grow in large numbers.
Explanation:
The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
343932
Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analyzing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted?
1 0.06 mg/L
2 6 mg/L
3 0.16 mg/L
4 0.6 mg/L
Explanation:
More the BOD , means more pollution
KCET - 2023
BIOXII10: MICROBES IN HUMAN WELFARE
343945
Activated sludge should have the ability to settle quickly so that it can:
1 Be rapidly pumped back from sedimentation tank to aeration tank
2 Absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
3 Be discarded and anaerobically digested
4 Absorb colloidal organic matter.
Explanation:
Be discarded and anaerobically digested
NCERT Exemplar
BIOXII10: MICROBES IN HUMAN WELFARE
343944
STP treatment is carried out in two stages. They are
1 Biological treatment
2 Secondary treatment
3 Primary treatment
4 All of them
Explanation:
STP treatment is carried out in two stages. They are 1. Primary treatment, 2. Secondary treatment/ Biological treatment.
BIOXII10: MICROBES IN HUMAN WELFARE
343922
Biological oxygen demand is a measure of
1 Industrial wasted poured into water bodies.
2 Extent to which water is polluted with organic compounds.
3 Amount of oxygen needed by green plants during night.
4 Amount of carbon monoxide inseparably combined with haemoglobin
Explanation:
Biochemical oxygen demand is measure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample over a specific time period.
BIOXII10: MICROBES IN HUMAN WELFARE
343923
What would happen if oxygen availability to activated sludge flocs is reduced?
1 It will slow down the rate of degradation of organic matter
2 The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
3 Flocs would increase in size as anaerobic bacteria would grow around flocs.
4 Protozoa would grow in large numbers.
Explanation:
The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
