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    Question

    Nitrogen concentration in the atmosphere

    A 78% Correct Answer Incorrect Answer
    B 50% Correct Answer Incorrect Answer
    C 20% Correct Answer Incorrect Answer
    D 55% Correct Answer Incorrect Answer

    Solution

    N concentration in atmosphere is 78 %, followed by oxygen (21%), Argon (0.93 %), CO2 (0.03 %)

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