PHYSIOGRAPHIC DIVISION OF INDIA
NORTHEN PLALNS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bhangar
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Khadar
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Bhavar
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Kankar
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Detailed explanation-1: -The Bhangar region has calcareous deposits, locally known as Kankar; the Khadar soil has fine silt and clay.
Detailed explanation-2: -The calcareous deposits in the northern plains are known as Kankar.
Detailed explanation-3: -Calcareous sediments are usually deposited in shallow water near land, since the carbonate is precipitated by marine organisms that need land-derived nutrients.
Detailed explanation-4: -It contains calcareous deposits locally known as ‘Kankar’. Soil is not very fertile. And hence not suitable for agriculture. Newer alluvium is called Khadar.
Detailed explanation-5: -When calcium and magnesium are supersaturated in seawater, they form calcium carbonate (CaCO3), magnesium carbonate (MgCO3) and magnesium hydroxide Mg(OH)2. These solid products, known as calcareous deposits, promote a physical barrier against oxygen diffusion, hence decreasing the corrosion rate.