164553
BOD is the measure of the organic matter present in the water. During the biological treatment of the sewage water, the process is carried out till :
1 BOD is elevated
2 BOD is increased exponentially
3 BOD is reduced
4 BOD becomes zero
Explanation:
\(\mathrm{BOD}\) refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
NCERT-II-154
8 RBTS PAPER
164554
The anaerobic biological treatment of the sludge produces an inflammable gas. What is the composition of this gas :
In the anaerobic sludge digesters, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.
NCERT-II-154
8 RBTS PAPER
164555
The 'Ganga Action Plan' was initiated by
1 Pollution control board
2 KVIC
3 The Ministry of Environment and Forests
4 Both (a.) and (b.)
Explanation:
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.
NCERT-II-155
8 RBTS PAPER
164556
What function do methanogens perform in the rumen of cattle :
1 Digestion of peptides
2 Digestion of cellulose
3 Inhibition of growth of other bacteria
4 Production of propane gas
Explanation:
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
NCERT-II-155
8 RBTS PAPER
164557
Which of the following are important for dengue prevention.
1 Using mosquito repellents
2 Keeping the door and window close
3 Eliminate all breeding grounds
4 All of the above
Explanation:
- Using mosquito repellents - Keeping the door and window close - Eliminate all breeding grounds
164553
BOD is the measure of the organic matter present in the water. During the biological treatment of the sewage water, the process is carried out till :
1 BOD is elevated
2 BOD is increased exponentially
3 BOD is reduced
4 BOD becomes zero
Explanation:
\(\mathrm{BOD}\) refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
NCERT-II-154
8 RBTS PAPER
164554
The anaerobic biological treatment of the sludge produces an inflammable gas. What is the composition of this gas :
In the anaerobic sludge digesters, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.
NCERT-II-154
8 RBTS PAPER
164555
The 'Ganga Action Plan' was initiated by
1 Pollution control board
2 KVIC
3 The Ministry of Environment and Forests
4 Both (a.) and (b.)
Explanation:
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.
NCERT-II-155
8 RBTS PAPER
164556
What function do methanogens perform in the rumen of cattle :
1 Digestion of peptides
2 Digestion of cellulose
3 Inhibition of growth of other bacteria
4 Production of propane gas
Explanation:
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
NCERT-II-155
8 RBTS PAPER
164557
Which of the following are important for dengue prevention.
1 Using mosquito repellents
2 Keeping the door and window close
3 Eliminate all breeding grounds
4 All of the above
Explanation:
- Using mosquito repellents - Keeping the door and window close - Eliminate all breeding grounds
164553
BOD is the measure of the organic matter present in the water. During the biological treatment of the sewage water, the process is carried out till :
1 BOD is elevated
2 BOD is increased exponentially
3 BOD is reduced
4 BOD becomes zero
Explanation:
\(\mathrm{BOD}\) refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
NCERT-II-154
8 RBTS PAPER
164554
The anaerobic biological treatment of the sludge produces an inflammable gas. What is the composition of this gas :
In the anaerobic sludge digesters, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.
NCERT-II-154
8 RBTS PAPER
164555
The 'Ganga Action Plan' was initiated by
1 Pollution control board
2 KVIC
3 The Ministry of Environment and Forests
4 Both (a.) and (b.)
Explanation:
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.
NCERT-II-155
8 RBTS PAPER
164556
What function do methanogens perform in the rumen of cattle :
1 Digestion of peptides
2 Digestion of cellulose
3 Inhibition of growth of other bacteria
4 Production of propane gas
Explanation:
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
NCERT-II-155
8 RBTS PAPER
164557
Which of the following are important for dengue prevention.
1 Using mosquito repellents
2 Keeping the door and window close
3 Eliminate all breeding grounds
4 All of the above
Explanation:
- Using mosquito repellents - Keeping the door and window close - Eliminate all breeding grounds
164553
BOD is the measure of the organic matter present in the water. During the biological treatment of the sewage water, the process is carried out till :
1 BOD is elevated
2 BOD is increased exponentially
3 BOD is reduced
4 BOD becomes zero
Explanation:
\(\mathrm{BOD}\) refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
NCERT-II-154
8 RBTS PAPER
164554
The anaerobic biological treatment of the sludge produces an inflammable gas. What is the composition of this gas :
In the anaerobic sludge digesters, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.
NCERT-II-154
8 RBTS PAPER
164555
The 'Ganga Action Plan' was initiated by
1 Pollution control board
2 KVIC
3 The Ministry of Environment and Forests
4 Both (a.) and (b.)
Explanation:
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.
NCERT-II-155
8 RBTS PAPER
164556
What function do methanogens perform in the rumen of cattle :
1 Digestion of peptides
2 Digestion of cellulose
3 Inhibition of growth of other bacteria
4 Production of propane gas
Explanation:
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
NCERT-II-155
8 RBTS PAPER
164557
Which of the following are important for dengue prevention.
1 Using mosquito repellents
2 Keeping the door and window close
3 Eliminate all breeding grounds
4 All of the above
Explanation:
- Using mosquito repellents - Keeping the door and window close - Eliminate all breeding grounds
164553
BOD is the measure of the organic matter present in the water. During the biological treatment of the sewage water, the process is carried out till :
1 BOD is elevated
2 BOD is increased exponentially
3 BOD is reduced
4 BOD becomes zero
Explanation:
\(\mathrm{BOD}\) refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
NCERT-II-154
8 RBTS PAPER
164554
The anaerobic biological treatment of the sludge produces an inflammable gas. What is the composition of this gas :
In the anaerobic sludge digesters, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.
NCERT-II-154
8 RBTS PAPER
164555
The 'Ganga Action Plan' was initiated by
1 Pollution control board
2 KVIC
3 The Ministry of Environment and Forests
4 Both (a.) and (b.)
Explanation:
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.
NCERT-II-155
8 RBTS PAPER
164556
What function do methanogens perform in the rumen of cattle :
1 Digestion of peptides
2 Digestion of cellulose
3 Inhibition of growth of other bacteria
4 Production of propane gas
Explanation:
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle. In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
NCERT-II-155
8 RBTS PAPER
164557
Which of the following are important for dengue prevention.
1 Using mosquito repellents
2 Keeping the door and window close
3 Eliminate all breeding grounds
4 All of the above
Explanation:
- Using mosquito repellents - Keeping the door and window close - Eliminate all breeding grounds
