318634
Rivers or lakes may be converted into dry lands due to
1 Over nutrition
2 High pH
3 Salinity
4 Alkalines
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318635
Polluted water can be purified by using
1 micro-organisms
2 algae
3 pesticides
4 fishes
Explanation:
Because in the presence of oxygen micro-organisms (Bacteria)oxidise the complex organic components to inorganic forms.
CHXI14:ENVIRONMENTAL CHEMISTRY
318636
Which of the aquatic plant helps in controlling water pollution?
1 Algae
2 Water hyacinth
3 Fungi
4 All
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318637
Which one of the following statements is not true?
1 Dissolved oxygen (DO) in cold water can reach a concentration up to \({\text{10}}\,\,{\text{ppm}}{\text{.}}\)
2 Clean water would have a BOD value of 5 ppm
3 Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to \({\text{1}}\,\,{\text{ppm}}{\text{.}}\)
4 When the \(\mathrm{pH}\) of rain water is higher than 6.5 , it is called acid rain
Explanation:
Acid rain is the rain water containing sulphuric acid and nitric acid, which are formed from the oxides of sulphur and nitrogen present in the air as pollutants and rain water has a \(\mathrm{pH}\) of \(4-5\).
CHXI14:ENVIRONMENTAL CHEMISTRY
318638
Among the following, the incorrect statement is
1 Lower the concentration of D.O., more polluted is the water sample.
2 The tolerable limit of lead in drinking water is \({\text{50}}\,\,{\text{ppb}}\)
3 Water is considered pure if it has BOD less than 5 ppm.
4 In COD determination, the pollutants resistant to microbial oxidation are not oxidised by oxidizing agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
Explanation:
In COD determination, the pollutants resistant to microbial oxidation are also oxidised by oxidising agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
318634
Rivers or lakes may be converted into dry lands due to
1 Over nutrition
2 High pH
3 Salinity
4 Alkalines
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318635
Polluted water can be purified by using
1 micro-organisms
2 algae
3 pesticides
4 fishes
Explanation:
Because in the presence of oxygen micro-organisms (Bacteria)oxidise the complex organic components to inorganic forms.
CHXI14:ENVIRONMENTAL CHEMISTRY
318636
Which of the aquatic plant helps in controlling water pollution?
1 Algae
2 Water hyacinth
3 Fungi
4 All
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318637
Which one of the following statements is not true?
1 Dissolved oxygen (DO) in cold water can reach a concentration up to \({\text{10}}\,\,{\text{ppm}}{\text{.}}\)
2 Clean water would have a BOD value of 5 ppm
3 Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to \({\text{1}}\,\,{\text{ppm}}{\text{.}}\)
4 When the \(\mathrm{pH}\) of rain water is higher than 6.5 , it is called acid rain
Explanation:
Acid rain is the rain water containing sulphuric acid and nitric acid, which are formed from the oxides of sulphur and nitrogen present in the air as pollutants and rain water has a \(\mathrm{pH}\) of \(4-5\).
CHXI14:ENVIRONMENTAL CHEMISTRY
318638
Among the following, the incorrect statement is
1 Lower the concentration of D.O., more polluted is the water sample.
2 The tolerable limit of lead in drinking water is \({\text{50}}\,\,{\text{ppb}}\)
3 Water is considered pure if it has BOD less than 5 ppm.
4 In COD determination, the pollutants resistant to microbial oxidation are not oxidised by oxidizing agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
Explanation:
In COD determination, the pollutants resistant to microbial oxidation are also oxidised by oxidising agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
318634
Rivers or lakes may be converted into dry lands due to
1 Over nutrition
2 High pH
3 Salinity
4 Alkalines
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318635
Polluted water can be purified by using
1 micro-organisms
2 algae
3 pesticides
4 fishes
Explanation:
Because in the presence of oxygen micro-organisms (Bacteria)oxidise the complex organic components to inorganic forms.
CHXI14:ENVIRONMENTAL CHEMISTRY
318636
Which of the aquatic plant helps in controlling water pollution?
1 Algae
2 Water hyacinth
3 Fungi
4 All
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318637
Which one of the following statements is not true?
1 Dissolved oxygen (DO) in cold water can reach a concentration up to \({\text{10}}\,\,{\text{ppm}}{\text{.}}\)
2 Clean water would have a BOD value of 5 ppm
3 Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to \({\text{1}}\,\,{\text{ppm}}{\text{.}}\)
4 When the \(\mathrm{pH}\) of rain water is higher than 6.5 , it is called acid rain
Explanation:
Acid rain is the rain water containing sulphuric acid and nitric acid, which are formed from the oxides of sulphur and nitrogen present in the air as pollutants and rain water has a \(\mathrm{pH}\) of \(4-5\).
CHXI14:ENVIRONMENTAL CHEMISTRY
318638
Among the following, the incorrect statement is
1 Lower the concentration of D.O., more polluted is the water sample.
2 The tolerable limit of lead in drinking water is \({\text{50}}\,\,{\text{ppb}}\)
3 Water is considered pure if it has BOD less than 5 ppm.
4 In COD determination, the pollutants resistant to microbial oxidation are not oxidised by oxidizing agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
Explanation:
In COD determination, the pollutants resistant to microbial oxidation are also oxidised by oxidising agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXI14:ENVIRONMENTAL CHEMISTRY
318634
Rivers or lakes may be converted into dry lands due to
1 Over nutrition
2 High pH
3 Salinity
4 Alkalines
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318635
Polluted water can be purified by using
1 micro-organisms
2 algae
3 pesticides
4 fishes
Explanation:
Because in the presence of oxygen micro-organisms (Bacteria)oxidise the complex organic components to inorganic forms.
CHXI14:ENVIRONMENTAL CHEMISTRY
318636
Which of the aquatic plant helps in controlling water pollution?
1 Algae
2 Water hyacinth
3 Fungi
4 All
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318637
Which one of the following statements is not true?
1 Dissolved oxygen (DO) in cold water can reach a concentration up to \({\text{10}}\,\,{\text{ppm}}{\text{.}}\)
2 Clean water would have a BOD value of 5 ppm
3 Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to \({\text{1}}\,\,{\text{ppm}}{\text{.}}\)
4 When the \(\mathrm{pH}\) of rain water is higher than 6.5 , it is called acid rain
Explanation:
Acid rain is the rain water containing sulphuric acid and nitric acid, which are formed from the oxides of sulphur and nitrogen present in the air as pollutants and rain water has a \(\mathrm{pH}\) of \(4-5\).
CHXI14:ENVIRONMENTAL CHEMISTRY
318638
Among the following, the incorrect statement is
1 Lower the concentration of D.O., more polluted is the water sample.
2 The tolerable limit of lead in drinking water is \({\text{50}}\,\,{\text{ppb}}\)
3 Water is considered pure if it has BOD less than 5 ppm.
4 In COD determination, the pollutants resistant to microbial oxidation are not oxidised by oxidizing agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
Explanation:
In COD determination, the pollutants resistant to microbial oxidation are also oxidised by oxidising agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
318634
Rivers or lakes may be converted into dry lands due to
1 Over nutrition
2 High pH
3 Salinity
4 Alkalines
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318635
Polluted water can be purified by using
1 micro-organisms
2 algae
3 pesticides
4 fishes
Explanation:
Because in the presence of oxygen micro-organisms (Bacteria)oxidise the complex organic components to inorganic forms.
CHXI14:ENVIRONMENTAL CHEMISTRY
318636
Which of the aquatic plant helps in controlling water pollution?
1 Algae
2 Water hyacinth
3 Fungi
4 All
Explanation:
Conceptual Questions
CHXI14:ENVIRONMENTAL CHEMISTRY
318637
Which one of the following statements is not true?
1 Dissolved oxygen (DO) in cold water can reach a concentration up to \({\text{10}}\,\,{\text{ppm}}{\text{.}}\)
2 Clean water would have a BOD value of 5 ppm
3 Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to \({\text{1}}\,\,{\text{ppm}}{\text{.}}\)
4 When the \(\mathrm{pH}\) of rain water is higher than 6.5 , it is called acid rain
Explanation:
Acid rain is the rain water containing sulphuric acid and nitric acid, which are formed from the oxides of sulphur and nitrogen present in the air as pollutants and rain water has a \(\mathrm{pH}\) of \(4-5\).
CHXI14:ENVIRONMENTAL CHEMISTRY
318638
Among the following, the incorrect statement is
1 Lower the concentration of D.O., more polluted is the water sample.
2 The tolerable limit of lead in drinking water is \({\text{50}}\,\,{\text{ppb}}\)
3 Water is considered pure if it has BOD less than 5 ppm.
4 In COD determination, the pollutants resistant to microbial oxidation are not oxidised by oxidizing agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).
Explanation:
In COD determination, the pollutants resistant to microbial oxidation are also oxidised by oxidising agent like \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\).