Question:
The density of Corundum is
The density of Corundum is
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Corundum is crystalline alumina \((Al_2O_3)\), and its density is approximately \(4\ \text{gm/cc}\).
Updated On: May 7, 2026
- \(2.5\ \text{gm/cc}\)
- \(4\ \text{gm/cc}\)
- \(3\ \text{gm/cc}\)
- \(5\ \text{gm/cc}\)
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The Correct Option is B
Solution and Explanation
Corundum is a crystalline form of alumina.
Its chemical formula is:
\[
Al_2O_3.
\]
Corundum is a very hard and dense mineral.
It is also an important refractory raw material because it has high hardness, high melting point, and good chemical stability.
The density of corundum is approximately:
\[
4\ \text{gm/cc}.
\]
Now compare with the given options.
The option:
\[
2.5\ \text{gm/cc}
\]
is too low for corundum.
The option:
\[
3\ \text{gm/cc}
\]
is also lower than the standard density of corundum.
The option:
\[
5\ \text{gm/cc}
\]
is higher than the usual density of corundum.
Therefore, the correct density of corundum is:
\[
4\ \text{gm/cc}.
\]
Hence, the correct answer is:
\[
4\ \text{gm/cc}.
\]
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