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Q.

Which one of the following is not an essential element for plants?

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a

Potassium

b

Zinc

c

Sodium

d

Iron

answer is B.

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Detailed Solution

The correct answer is sodium.

Sodium is not essential for plants as plants can complete their life cycle without sodium and its function can be replaced by plant nutrients.

However, potassium, iron, and zinc are needed to perform various functional processes. 

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Which one of the following is not an essential element for plants?