7th Grade > Chemistry
WASTEWATER STORY MCQs
Total Questions : 116
| Page 12 of 12 pages
Answer: Option B. ->
Sewerage
:
B
Sewerage is a network of big and small pipes called sewers that transport sewage from the point of being produced, such as, households, industries to the point of point of disposal i.,e., the treatment plants.
Sewage contains suspended solids, organic and inorganic impurities. Sluge is a by-product produced in wastewater treatment.
:
B
Sewerage is a network of big and small pipes called sewers that transport sewage from the point of being produced, such as, households, industries to the point of point of disposal i.,e., the treatment plants.
Sewage contains suspended solids, organic and inorganic impurities. Sluge is a by-product produced in wastewater treatment.
Answer: Option B. ->
Typhoid
:
A, B, and D
Waterborne diseases are caused by drinking contaminated or polluted water. This infected water can cause various kinds of diarrheal diseases, such as cholera, and other serious illnesses such as typhoid, and dysentery. Asthma is an air borne disease and is caused by breathing in polluted air.
:
A, B, and D
Waterborne diseases are caused by drinking contaminated or polluted water. This infected water can cause various kinds of diarrheal diseases, such as cholera, and other serious illnesses such as typhoid, and dysentery. Asthma is an air borne disease and is caused by breathing in polluted air.
Answer: Option B. ->
False
:
B
Water contains some microbes which degrade organic matter present in them and helps in purifying the wastewater. Chemicals like paints, insecticides kill the microbes present in water. Also, the toxic chemicals present in them cause water pollution. Hence, they should not be thrown down the drain.
:
B
Water contains some microbes which degrade organic matter present in them and helps in purifying the wastewater. Chemicals like paints, insecticides kill the microbes present in water. Also, the toxic chemicals present in them cause water pollution. Hence, they should not be thrown down the drain.
Answer: Option C. ->
tea leaves can harden and block the pipes.
:
C
The used tea leaves or solid food remains should not be thrown down into the drain as they can harden and block the pipes of the drain. Thus, the wastes choke the drains and do not allow free flow of oxygen. This in turn hampers the degradation process.
Therefore, used tea leaves should always be thrown in the dustbin.
:
C
The used tea leaves or solid food remains should not be thrown down into the drain as they can harden and block the pipes of the drain. Thus, the wastes choke the drains and do not allow free flow of oxygen. This in turn hampers the degradation process.
Therefore, used tea leaves should always be thrown in the dustbin.
Answer: Option D. ->
Pass chlorine through it
:
D
He should pass chlorine or ozone gas through it before supplying it to different parts of the city as they are disinfecting agents. They kill the bacteria and germs present in the water and make it fit for consumption.
:
D
He should pass chlorine or ozone gas through it before supplying it to different parts of the city as they are disinfecting agents. They kill the bacteria and germs present in the water and make it fit for consumption.
Answer: Option D. ->
Separate trash as biodegradable and non-biodegradable
:
A, B, and D
As a good practice, we should make sure that the drains are closed, we segregate wastes into biodegradable and non-biodegradable. We should put the wastes in the dustbin.
We should not defecate in open, it pollutes environment and causes diseases.
:
A, B, and D
As a good practice, we should make sure that the drains are closed, we segregate wastes into biodegradable and non-biodegradable. We should put the wastes in the dustbin.
We should not defecate in open, it pollutes environment and causes diseases.
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