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Standard XII
Chemistry
Redox Reactions and Couple
The red soils...
Question

The red soils develop a reddish colour due to __________.

A
deforestation and over-grazing
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B
the presence of potash and magnesia
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C
tropical monsoonal climate
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D
a wide diffusion of iron in ancient crystalline and metamorphic Jacks
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Solution

The correct option is D a wide diffusion of iron in ancient crystalline and metamorphic Jacks
Red soils develop a reddish colour due to diffusion of iron in crystalline and metamorphic rocks. It looks yellow when it occurs in a hydrated form.

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Q. Q. Consider the following statements about the types of soils found in India:Which of the above given statements is/are correct?

  1. 1 only

  2. 1 and 3 only

  3. 3 only

  4. 1, 2 and 3
Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> With respect to the Red and yellow soil , consider the following statements:


1. Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern part of the Deccan Plateau and also along the piedmont zone of western ghat.
2. The soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks. It looks yellow when it occurs in a hydrated form.
3. The fine-grained red and yellow soils are normally fertile, whereas coarse-grained soils found in dry upland areas are poor in fertility.
4. They are generally poor in nitrogen, phosphorus and humus.

Select the correct code from the following:

Q. Red soil is reddish in colour because of the presence of ________ in the soil.
Q.

Red soils are red in colour due to presence of


Q.

Which of the following are not correctly stated about the corresponding soil formation?

1. Alluvial Soils: formed by the deposition of sediments by rivers.

2. Black Soils: derived from weathering of ancient metamorphic rocks of Deccan Plateau

3. Laterite Soils: formed as a result of the accumulation of organic matter derived from forest growth.

4. Mountain Soils: formed due to intense leaching and are well developed on the summits of hills and uplands.

Select the code


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