Q. 71% of earth surface is covered with -
1) land
2) air
3) water
4) coal
Q. Air pollution causes -
1) global warming
2) floods
3) add rain
4) All of the above
Q. Deforestation is one of the sources of pollution because -
1) it increases the oxygen levels produced
2) it decreases the Carbon dioxide
3) it causes fertilizers to wash away in the water
4) it decreases atmospheric power to absorb carbon dioxide
Q. Oil spills are a source of pollution for -
1) water
2) land and water
3) land and air
4) air and noise
Q. Which of the following indicates the types of soil erosion in decreasing order of damage caused in India?
1) Ravine erosion and gullies, alkalinity and salinity, weeds and water-logging
2) Alkalinity and water-logging, ravine erosion and weeds
3) Water-logging, weeds, salinity and ravine erosion
4) All are equally damaging
Q. Which of the following States has very little alluvial soil ?
1) Bihar
2) Madhya Pradesh
3) Tamil Nadu
4) Punjab
Q. The soils of the Plains have not been derived -
1) from the Himalayan rocks
2) from the Peninsular rocks
3) onlv from the rocks existing locally
4) from material brought by the rivers
Q. Which of the following soils is formed under typical monsoonal conditions?
1) Black soils
2) Red soils
3) Laterite soils
4) None of the above
Q. Which of the following is incorrect ?
1) Red soils are rich in iron
2) Black soils are rich in phosphorus, nitrogen and organic matter
3) Alluvial soils are rich in potash but poor in phosphorus
4) Red soils are suitable for cultivation of pulses and coarse grains
Q. Which is the chief characteristic of the soil of the Indo-Gangetic plain?
1) It is derived from Himalayan rocks
2) It is rich in humus
3) It is formed of peninsular rocks
4) It is derived from local rocks
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