Environmental issues Quiz 5

Question 1

The Environment Act of Government of India was passed in

Accepted Answer

1986

Answer

1976

Answer

1966

Answer

1996

Question 2

Eutrophication is caused by

Accepted Answer

nitrates and phosphates

Answer

acid rain

Answer

sulphates and carbonates

Answer

$CO_2$ and CO

Question 3

Measuring Biochemical Oxygen Demand (BOD) is a method used for

Accepted Answer

estimating the amount of organic matter in sewage water.

Answer

working out the efficiency of oil driven automobile engines.

Answer

measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale.

Answer

working out the efficiency of RBCs about their capacity to carry oxygen.

Question 4

High value of BOD (Biochemical Oxygen Demand) indicates that

Accepted Answer

water is highly polluted

Answer

consumption of organic matter in the water is higher by the microbes

Answer

water is pure

Answer

water is less polluted

Question 5

When huge amount of sewage is dumped into a river, its BOD will

Accepted Answer

increase

Answer

decrease

Answer

sharply decrease

Answer

remain unchanged

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