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Which of the given is not a benefic...

Which of the given is not a beneficial element ?

A

Co

B

Na

C

Si

D

Ni

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the given elements is not a beneficial element, we will analyze each option provided in the question: cobalt, sodium, silicon, and nickel. ### Step 1: Understand the Definitions - **Beneficial Elements**: These are elements that are not essential for all plants but can promote growth in certain taxa or higher plants. They are not required by all plants. - **Essential Elements**: These are necessary for plant growth and development and are categorized into macronutrients (required in large amounts) and micronutrients (required in trace amounts). ### Step 2: Analyze Each Option 1. **Cobalt**: This is classified as a beneficial element. It helps in the growth of certain plants but is not essential for all. 2. **Sodium**: This is also considered a beneficial element. It can aid in certain physiological processes in some plants. 3. **Silicon**: Silicon is recognized as a beneficial element as well. It can enhance the strength and resistance of plants. 4. **Nickel**: Nickel is classified as an essential element, specifically a micronutrient. It is necessary for the growth of all plants, particularly for certain enzymatic functions. ### Step 3: Conclusion Based on the analysis, the element that is not a beneficial element is **Nickel**. ### Final Answer **Nickel** is not a beneficial element. ---
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