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    Question

    Which one of the following element is not essential for

    plant growth is:
    A Nickel Correct Answer Incorrect Answer
    B Sodium Correct Answer Incorrect Answer
    C Manganese Correct Answer Incorrect Answer
    D Zinc Correct Answer Incorrect Answer

    Solution

    The 17 essential elements of the plants are divided into two major categories called micronutrients and macronutrients. The element which is not so essential consists of an atomic number 16. So, the correct answer is 'Sodium'

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