Please answer Ques. 73 -
K 2 S O 4 . A l 2 S O 4 3 . 24 H 2 O  is known as Potash alum. It's aqueous solution does not show the properties of -
1)  K +  Ion
2)  A l 3 -  Ion
3)  S O 4 2 -  Ion
4)  O 2 -  Ion

The solution is as follows:

1. The correct option is (d) O2- ions.

2. This is because oxygen is non-ionisable in potash alum. Rest of the ions are ionisable.

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