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Question

Correct orders of Ist I.P. are -

(i) Li < B < Be < C       

(ii) O < N < F

(iii) Be < N < Ne



A

(i), (ii)

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B

(ii), (iii)

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C

(i), (iii)

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D

(i), (ii), (iii)

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Solution

The correct option is D

(i), (ii), (iii)


Down the group ionisation potential (ionisation enthalpy) decrease with increase in size. In period elements with stable electronic configuration have more ionisation potential

Elements of group 2(IIA) have more than group 13(IIA) as they have completely filled's' orbital. Be>B

Elements of group 15(VA) have more than group 16(VIA) as they have half filled 'P' sub shell. N>O

Inert gas elements have the highest I.P in a given period due to stable electronic configuration


Chemistry

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