49. Which of the following substance consists of only one element ?
(1) Glass
(2) Diamond
(3) Marble
(4) Sand
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Usually, a substance comprises of several elements or is a form of the single element.
Marble is a compound or more clearly a metamorphic rock composed of carbonate minerals, mostly calcite and dolomite.
The glass is obtained from sand which is heated at a very high temperature.
And sand is silicon dioxide in form of quartz.
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.
Marble is a compound or more clearly a metamorphic rock composed of carbonate minerals, mostly calcite and dolomite.
The glass is obtained from sand which is heated at a very high temperature.
And sand is silicon dioxide in form of quartz.
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.
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Answer:glass
Explanation:
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