Find the wrong one out.
(1) Due to increased urbanisation, desertification is the major problem.
(2) Irrigation without proper drainage of water leads to waterlogging in the soil, affects the crops
(3) Waterlogging affects the crops and hence the agriculture
(4) Waterlogging cause salt to go downwards
According to an estimate, almost…….
Forests have been lost in the tropics compared to only …… in the temperate regions.
(1) 20%, 10%
(2) 60%, 12%
(3) 40%, 1%
(4) 30%, 2%
Which of the following statements is not correct?
(1) At the beginning of the twentieth century, forests covered about 30% of the land of India
(2) By the end of the twentieth century, forest area shrunk to 21.54%
(3) According to National Forest Policy of India has recommended 33% forest cover for the plains.
(4) According to National Forest Policy India(1982) has recommended 76% forest cover for the hills
Which of the cultivation is responsible for deforestation?
(1) Slash and Burn Agriculture
(2) Jhum Cultivation
(3) Both A and B
(4) Cyclic Agriculture
Jhum cultivation causes deforestation in
(1) North western states of India
(2) South India
(3) North Eastern state of India
(4) North India
In Jhum cultivation, what is the probable fertiliser?
(1) Cow dung
(2) Ash
(3) Compost
(4) Cattle excreta
What is the difference between Jhum cultivation of earlier days and now a days?
(1) Time gap for the recovery of land is increased
(2) Time gap for the recovery of land is decreased
(3) Ash is not used as fertilizer anymore.
(4) No more forests are burn.
Which of the following is not an outcome of deforestation?
(1) Enhanced CO2 concentration
(2) Disturbed hydrologic cycles
(3) Loss of Biodiversity, soil erosion
(4) Soil salinity
Consider the following statements:
I. | Catalytic converters are fitted into automobiles for reducing the emission of poisonous gases. |
II. | They convert unburnt hydrocarbons to CO2 and H2O, and CO and NO to CO2 and N2 respectively. |
III. | Vehicles equipped with catalytic converters should use leaded petrol. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Consider the following statements:
1. | The “bad” ozone is the ozone that is formed in the troposphere. |
2. | The “good ozone” in the stratosphere acts as a shield against harmful UV radiation. |
3. | UV-A radiations can cause skin cancers and snow-blindness cataracts. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |