Environmental Issues · Question 17

World Ozone Day is celebrated on

1. 5th June
2. 21st April
3. 16th September
4. 22nd April

Match the items given in column I with those in column II and select the correct option given below.

1. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
2. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
3. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
4. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

Which one of the following statements is not valid for aerosols ?

1. They alter rainfall and monsoon patterns
2. They have negative impact on agricultural land
3. They cause increased agricultural productivity
4. They are harmful to human health

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called -

1. Shifting agriculture
2. Strip farming
3. Ley farming
4. Contour farming

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

1. Methane
2. Ozone
3. Nitrous oxide
4. Ammonia

Joint Forest Management Concept was introduced in India during :

1. 1990s
2. 1970s
3. 1960s
4. 1980s

A river with an inflow of domestic sewage rich in organic waste may result in -

1. Death of fish due to lack of oxygen
2. Increased population of aquatic food web organisms
3. Drying of the river very soon due to algal bloom
4. An increased production of fish due to biodegradable nutrients

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

1. petroleum industry
2. sugar industry
3. domestic sewage
4. dairy industry

A lake which is rich in organic waste may result in

1. mortality of fish due to lack of oxygen
2. increased population of fish due to lots of nutrients
3. increased population of aquatic organisms due to minerals
4. drying of the lake due to algal bloom

The highest DDT concentration in aquatic food chain shall occur in

1. crab
2. Phytoplankton
3. eel
4. seagull