SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is not considered a major element of life?
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carbon
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hydrogen
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oxygen
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calcium
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nitrogen
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Explanation:
Detailed explanation-1: -Scientists believe that about 25 of the known elements are essential to life. Just four of these – carbon (C), oxygen (O), hydrogen (H) and nitrogen (N) – make up about 96% of the human body.
Detailed explanation-2: -The six most common elements of life on Earth (including more than 97% of the mass of a human body) are carbon, hydrogen, nitrogen, oxygen, sulphur and phosphorus.
Detailed explanation-3: -1) The correct answer is option A, iron. The major constituents of microbial cell are as follows: Carbon (50%)-Organic constituents of cell Oxygen…
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