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Question

The second ionisation energy is always higher than the first ionisation energy because the:

A
ion becomes more stable attaining an octet or duplet configurations
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B
electron is more tightly bound to the nucleus in an ion
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C
electron is attracted more by the core electrons
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D
none of the above is the correct explanation
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Solution

The correct option is B electron is more tightly bound to the nucleus in an ion
In first ionisation energy, we remove electron from a neutral atom but for second ionisation we have to remove electron from a positive atom, where electron are more tightly bounded due to increased attraction force so second ionisation energy is high relative to first IP.

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