Water Pollution

Q.

Accidental discharge of petroleum in oceans or estuaries are called ______.

1. Industrial Wastes

2. Thermal pollution

3. Sewage

4. Oil spill

Q.

The term “water - pollution” can be defined in several ways. Which of the following statements does not give the correct definition?

1. The addition of undesirable substance to water bodies

2. The removal of desirable substances from water bodies

3. A change in pressure of the water bodies

4. A change in temperature of the water bodies

Q. Pancreatic juice converts carbohydrates into

अग्न्याशयी रस, कार्बोहाइड्रेट्स को परिवर्तित करता है

1. Fatty acids
   
   वसा अम्लों में
2. Amino acids
   
   ऐमीनो अम्लों में
3. Glycerol
   
   ग्लिसरॉल में
4. Glucose
   
   ग्लूकोस में

Q.

Differentiate between point sources and non- point sources of water pollution

Q.

Ashes after cremation of dead bodies are immersed into river bodies, this is a cause of __________ pollution

1. Air

2. Water

3. Soil

4. Noise

Q.

A lake with an inflow of fertilizers into the fields by rainwater lead to the

1. Drying of the lake

2. An increased production of fish due to a lot of nutrients

3. Death of fish due to lack of oxygen

4. Oxides of nitrogen

Q. What kind of pollution causes the most loss of life ?

1. Air pollution
2. Soil pollution
3. Noise pollution
4. Water pollution

Q. The following sentence tests correctness and effectiveness of expression. Part of the sentence or the entire sentence is underlined; beneath the sentence are five ways of phrasing the underlined material. Choice A repeats the original phrasing; the other four choices are different. If you think the original phrasing produces a better sentence than any of the alternative, select choice A; if not, select one of the other choices. In making your selection, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, sentence construction, and punctuation. Your selection should result in the most effective sentence-clear and precise, without awkwardness or ambiguity.

1. ocean; the contamination can last for several days
2. ocean that can last for several days
3. ocean, it can last for several days
4. ocean, while contamination can last several days
5. ocean, which can last for several days

Q.

Which of the following chemical properties determine the level of pollution in water.

1. pH

2. nutrient concentration

3. dissolved oxygen concentration

4. All of the above