Q.

Red soil looks yellow when it occurs in the:


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a

Hydrated form

b

Original form

c

Oxidized form

d

Degraded form 

answer is A.

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Detailed Solution

Red soil looks yellow when it occurs in the hydrated form.
Due to the presence of iron, the red soil gets its colour red. However, when it occurs in the hydrated form, it looks yellow. It is made by erosion of metamorphic rocks. The upper layer of red soil is fine, sandy, and porous, whereas the lower layer is very fertile.
 
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