Chemistry
Grade-10
Easy
Question
How does carbon occur in a combined state?
- Graphite
- Lamp black
- Coal
- Sugar
Hint:
Free state is the property of an element that does not require it to be combined with other elements or being chemically bonded with them.
The correct answer is: Sugar
- Graphite, diamond and lamp back are allotropes of carbon.
- They consists of pure elemental carbon. So they are in free state.
- Sugar is a hydrocarbon where carbon forms bonds with hydrogen and oxygen. It is combination of elements that is why it is in combined state.
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