What is the action of heating on potash alum?

Loss of water of crystallisation

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Change of colour

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Both loss of water of crystallisation and change of colour

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None of the above

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Solution

The correct option is D Loss of water of crystallisation
Option $(A)$ is correct.
On heating potash alum it losses water of crystallisation.It losses 12 $H_{2} O$ molecules and gets converted into anhydrous potassium aluminium sulfate [ $K A l (S O_{4})_{2}$ ].

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Similar questions

What do you understand by the water of crystallisation?

Give four substances which contain water of crystallisation and write their common names.

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