X in limited amount is present in soil and is essential for plants nutrients but if present in high concentration can be harmful both for plants, animals and aquatic organisms. What is X?

Hydrogen Sulphide

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Ammonia

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Water

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Carbon dioxide

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Solution

The correct option is C Ammonia
Low concentrations of ammonia in the soil are natural and actually essential for plant nutrition. Over-fertilisation can, however, lead to excessive concentrations which result in leaching to water bodies, which could affect animals drinking water from that water bodies and aquatic organisms.

Hence, X is ammonia.

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