The Living WorldMedium
Question
Arrange the following elements in descending order of their contribution to percentage weight of the human body.
a. Oxygen
b. Carbon
c. Hydrogen
d. Nitrogen
Choose the correct answer from the options given below :
Options
A.b, c, d, a
B.b, a, c, d
C.a, b, c, d
D.c, a, b, d
Solution
Sol. [Key Concept: Elemental composition of living matter]
The arrangement of elements in descending order of their contribution to percentage weight of the human body is
$$\text{~}\text{Oxygen}\text{~}(65\%) \rightarrow \text{~}\text{Carbon}\text{~}(18.5\%) \rightarrow \text{~}\text{Hydrogen}\text{~}(9.5\%) \rightarrow \text{~}\text{Nitrogen}\text{~}(3.3\%)$$
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