Chemistry
Grade-9
Easy
Question
What is the correct formula for the compound calcium carbide?
- CaC
- Ca2C
- CaC2
- Ca2C4
Hint:
A compound always tends to be neutral.
The correct answer is: CaC2
- In the chemical formula, metals are written first followed by non-metals.
- The subscript tells about the number of atoms present in each.
- A compound always tends to be neutral.
- Calcium has an oxidation state of +2, and carbon has an oxidation state of -1. To make the compound neutral one calcium atom and two carbon atoms are required. Hence, the correct formula for calcium carbide is CaC2.
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