Question

The non-mineral elements are

• A. C, H, O
• B. N, Ca, Mg
• C. Fe, Co, Mn
• D. Cu, Mo, N

Answer 1

Answer: (A)

C, H, O

The word "Mineral" is used by geologists for a group of naturally occurring crystalline substances. Gold, pyrite, quartz, calcite, and fluorite are all examples of "Minerals". To be a mineral a substance must meet five requirements: naturally occurring (not made by humans) inorganic (not produced by an organism).These are the non-mineral essential elements commonly enter a plant body as CO2, H2O. These elements are the building blocks of macromolecules and constitute over 90% of the total dry matter of the plant. Hence these are commonly known as framework elements. So, the correct answer is "C, H, O".