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Question

IE2 for an element are invariably higher than IE1 because:

A
the size of cation is smaller than its atom
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B
it is difficult to remove 'e' from cation
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C
ionisation energy is endothermic
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D
all of the above
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Solution

The correct options are
C it is difficult to remove 'e' from cation
D the size of cation is smaller than its atom
IE2 for an element are invariably higher than IE1 because the size of cation is smaller than its atom and it is difficult to remove 'e' from cation.
Second ionization energy is greater than first ionization energy for an element as it is harder to remove a negatively charged electron from the positively charged ion.

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