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JEE Main Chemistry Class 11 Classification of Elements and Periodicity in Properties 1 Questions

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Question : 53

Total: 100

B has a smaller first ionization cnthalpy than Be. Consider the following statements:
(I) it is casier to remove 2p electron than 2s electron
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be
(III) 2s electron has more penetration power than 2p electron (IV) atomic radius of B is more than Be (atomic number B=5,Bc=4 )
The correct statements are:

[Jan. 09,2020 (I)]

(I), (II) and (IV)
(II), (III) and (IV)
(I), (II) and (III)
(I), (III) and (IV)

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