1.

The Incorrect statements(s) among the following is/are :-

Answer»

The FIRST ionisation energy of calcium is more than first ionisation energy of Gallium
The second ionisation energy of copper is greater than that of potassium
The third ionisation energy of MG is greater than the third ionisation energy of Al
The `IE_(1)` of `Mg^(+)` is less than the `IE_(1)` of `NA^(+)`

Answer :B


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