Chemistry · 2020
JEE Main · 9 January 2020, Shift 1 · Q32
B has a smaller first ionization enthalpy than Be. Consider the following statements: (I) it is easier to remove 2p electron than 2s electron (II) 2…
B has a smaller first ionization enthalpy than Be. Consider the following statements :
(I)
it is easier to remove 2p electron than 2s electron
(II)
$\displaystyle 2$ p 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 $\displaystyle \mathrm{B}=5, \mathrm{Be}=4$ )
The correct statements are :
Official answer
(1)
(I) , (II) and (III)
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JEE Main 2020 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.