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IE1 of an element is lower than that of ...

`IE_1` of an element is lower than that of `IE_2` because 

A

It is difficult to remove an electron from cation compared to from the same element.

B

the ionisation process is endothermic.

C

the size of cation is smaller than its atom.

D

all of the above.

Text Solution

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The correct Answer is:
A, C
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