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Which of the following choices represent...

Which of the following choices represent the correct order of first ionisation enthalpy ?

A

`B lt C lt N lt O lt F`

B

`B gt C gt N gt O gt F`

C

`B lt C lt N gt O lt F`

D

`B lt C lt N gt O gt F`

Text Solution

Verified by Experts

Ionisation energy is the minimum amount of energy required to removed the outermost electron from an isolaed gasseous atom. Quantitatively, it depends on the attraction between electron present on outermost shell and nucleus. Greater the interaction between outermost electron and nucleus, higher will be its ionisation enthalpy. So, correct order of first it must be
`B lt C lt N lt O lt F`
But due to extra stable half-filled electronic configuration of p-orbital, N has more value of first ionisation enthalpy than oxygen hence, correct order is
`B lt C lt N gt O gt F`
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