Which of the following is natural and human disturbance in ecology ?

(a)

Forest fire

(b)

Floods

(c)

Acid rain

(d)

Green house effect

The pH of normal rain water is ________

(a)

6.5

(b)

7.5

(c)

5.6

(d)

4.6

Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using __________.

(a)

grit chamber

(b)

scrubbers

(c)

trickling filters

(d)

catalytic convertors

Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ___________.

(a)

highly polluted

(b)

poor in dissolved oxygen

(c)

rich in dissolved oxygen

(d)

low COD

Which among the following is a green house gas ?

(a)

H₂

(b)

CH₄

(c)

O₃

(d)

All of these

An example for biodegradable pollutant is ..............

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plant waste

.............. gas is used in the process of photosynthesis.

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CO₂

................. binds with hemoglobin and reduce the oxygen-carrying capacity of blood.

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CO

Earth's average surface temperature would be only about ................

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-18°C

CO

(1)

Kidney damage

Acid rain

(2)

Stone leprosy

Lead

(3)

affect central nervous system

Lead in water

(4)

Cardiac arrest

Define smog.

What are degradable and nondegradable pollutants ?

What is green chemistry ?

Explain how does greenhouse effect cause global warming.

What is green house effect ?

Define particulate pollutants.

Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water ?

From where does ozone come in the photo chemical smog ?

Explain how oxygen deficiency is caused by carbon monoxide in our blood ? Give its effect

What are the various methods you suggest to protect our environment from pollution ?

Write about Bhopal gas tragedy.

What are particulate pollutants ? Explain any three.

Differentiate the following
(i) BOD and COD
(ii) Viable and non-viable particulate pollutants