Water soluble inorganic nutrient go down into the soil horizon get precipitates as salts this process is called _________.

Catabolism

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Mineralization

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Humification

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Leaching

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Solution

The correct option is D Leaching
Water soluble inorganic nutrient go down into the soil horizon get precipitates as salts, this process is called leaching. Catabolism is breakdown of complex organic substance into simpler one. Humification is the process of formation of humans where as mineralization is when humans is further broken down to inorganic nutrients by microbes.

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Q. Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements [(i), (ii) and (iii) regarding these and select the correct option.
(i) Detritivores(e.g., earthworm) breakdown detritus into smaller particles.
(ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts.
(iii) Decomposes(e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.

Q. Match column A with column B and choose the correct option.

Column A	Column B
I. Humification	a. Percolation of water soluble inorganic nutrients into the soil
II. Leaching	b. Organic matter formed at consumer level
III. Secondary productivity	c. Process of decomposition of detritus to form a nutrient-rich dark coloured, amorphous substance

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(i) It is soluble in water and the solution has sweet taste.
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ii) The solution gives a white precipitate with dilute HCl which is soluble in hot water.

iii) The salt when heated gives acetone and a yellow coloured residue. Identify the salt (A) and give chemical reactions.

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