Question

Which of the following contains only one element"

• A. Marble
• B. Diamond
• C. Glass
• D. Sand

Answer 1

The correct option is B Diamond

Usually, a substance comprises of several elements or is a form of the single element.

• $\text{Marble is a compound, more clearly a metamorphic rock composed of carbonate minerals, mostly calcite and dolomite.}$
• $\text{The glass is obtained from sand which is heated at a very high temperature.}$

• $\text{And sand is silicon dioxide in form of quartz.}$

• $\text{Diamond is the only substance that forms of a single element which is carbon}$ as the diamond if a solid form of carbon in the cubic crystal structure.

$\text{thus,correct B. is correct answer.}$