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81
Which of the following minerals is needed for generation of nuclear power?
Discuss
Answer & Solution
Answer: Option D
Solution:
Uranium is needed for generation of nuclear power. The isotope U-235 is important because under certain conditions it can readily be split, yielding a lot of energy. It is therefore said to be 'fissile' and we use the expression 'nuclear fission'. Meanwhile, like all radioactive isotopes, they decay.
82
A form of condensation which reduces the visibility and causes breathing problems, is
Discuss
Answer & Solution
Answer: Option C
Solution:
In the foggy conditions mostly during winters the smoke released from industries combine with fog to form smoke fog, also known as smog. It is highly polluted & causes breathing problem.
83
During the early period of Industrial Revolution industries were located primarily
Discuss
Answer & Solution
Answer: Option C
Solution:
During the early period of Industrial Revolution industries were located primarily near coal fields. Coalfields helped to make the regions where they were located prosperous.
84
The role of spines in the desert plants is ________
Discuss
Answer & Solution
Answer: Option C
Solution:
The role of spines in the desert plants is to save the moisture from evaporation. Cacti have leaves that have evolved into spines, which help minimize water loss by evaporation and screen the plant from the sun. Their thorny spines also help protect them from predators. Within hours after a rainfall, the cactus' roots sprout tiny rootlets to help absorb water even more quickly.
85
Precipitation in the form of a mixture of rain and snow is called
Discuss
Answer & Solution
Answer: Option C
Solution:
Precipitation in the form of a mixture of rain and snow is called Sleet. When the temperature near the ground surface are lower than temperatures of above lying layers. Then precipitation occurs in the form of sleet as raindrops frezes into ice while falling. It happens mostly in winter.
86
The essential feature of shifting cultivation is
Discuss
Answer & Solution
Answer: Option B
Solution:
The essential feature of shifting cultivation is rotation of fields. Shifting agriculture, system of cultivation that preserves soil fertility by plot (field) rotation, as distinct from crop rotation.
87
Cork is chiefly produced in ________
Discuss
Answer & Solution
Answer: Option C
Solution:
Cork is chiefly produced in Cadiz (Spain). Following the disastrous forest fires in Portugal in 2003, Spain has become the world's biggest single producer of cork.
88
Fog is an Example of
Discuss
Answer & Solution
Answer: Option B
Solution:
Fog is an example of naturally occuring aerosol. A colloid of liquid droplets in air or gas is termed as aerosol.
89
Which one among the following covers the highest percentage of forest area in the world?
Discuss
Answer & Solution
Answer: Option A
Solution:
Temperate Coniferous forests covers the highest percentage of forest literacy rate in the world. Temperate coniferous forest is a terrestrial biome found in temperate regions of the world with warm summers and cool winters and adequate rainfall to sustain a forest.
90
Which of the following natural regions is not found in the Torrid Zone?
Discuss
Answer & Solution
Answer: Option C
Solution:
Temperate deserts regions are not found in the Torrid Zone. Temperate deserts are found in the latitudes between tropical and polar regions. They typically have similar aridity to and lower temperatures than tropical deserts.