Question

Potash alum is commonly known as:

• A. common alum
• B. burnt alum
• C. hydrated alum
• D. none of the above

Answer 1

The correct option is A common alum

Option $\left(A\right)$ is correct.

Potash alum is commonly known as common alum. It is potassium aluminium sulfate having chemical formula, $KAl(S{O}_4{)}_2$ and it is commonly found in its dodecahydrate form as $KAl(S{O}_4{)}_2\cdot 12H_{2}O$.