Question:
Which one of the following is NOT a trace element in plants?
Which one of the following is NOT a trace element in plants?
Show Hint
Magnesium is needed in large amounts.
Updated On: Nov 12, 2026
- Magnesium
- Copper
- Cobalt
- Chlorine
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
Trace elements (micronutrients) are needed in very small amounts, for example Fe, Mn, Cu, Zn, B, Mo and Cl. Cobalt is needed in traces for nitrogen fixing legumes.
Step 2: Magnesium
Magnesium is the central atom of chlorophyll and activates many enzymes. It is needed in large amounts, so it is a macronutrient.
Step 3: Conclusion
Magnesium is not a trace element.
Final Answer:
Magnesium is not a trace element. \[ \boxed{\text{(A) }\text{Magnesium}} \]
Trace elements (micronutrients) are needed in very small amounts, for example Fe, Mn, Cu, Zn, B, Mo and Cl. Cobalt is needed in traces for nitrogen fixing legumes.
Step 2: Magnesium
Magnesium is the central atom of chlorophyll and activates many enzymes. It is needed in large amounts, so it is a macronutrient.
Step 3: Conclusion
Magnesium is not a trace element.
Final Answer:
Magnesium is not a trace element. \[ \boxed{\text{(A) }\text{Magnesium}} \]
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