JEE Main 20209 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 9 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Classification of Elements and Periodicity in Properties
JEE Main 2020 · 9 January · Morning Shift · Chemistry · Classification of Elements and Periodicity in Properties
B has a smaller first ionization enthalpy than Be . Consider the...
has a smaller first ionization enthalpy than . Consider the following statement:
(I) it is easier to remove electron than electron
(II) electron of is more shielded from the nucleus by the inner core of electrons than the electrons of
(III) electron has more penetration power than electron
(IV) atomic radius of is more than
(atomic number )
The correct statements are.
(I) it is easier to remove electron than electron
(II) electron of is more shielded from the nucleus by the inner core of electrons than the electrons of
(III) electron has more penetration power than electron
(IV) atomic radius of is more than
(atomic number )
The correct statements are.
Options
- A(I), (II) and (IV)
- B(II), (III) and (IV)
- C(I), (II) and (III)
- D(I), (III) and (IV)
Correct answer
C. (I), (II) and (III)
Step-by-step solution
Since, Penetration of s orbital is the maximum because of the closeness to the nucleus than the p, d and f orbitals
it is easier to remove electron than electron
_{\text{B}} > {\left({\text{Z}}_{\text{eff}}\right)}_{\text{Be}} So, shielding effect is more on 2p electron of B than 2s electron of Be
So,
it is easier to remove electron than electron
_{\text{B}} > {\left({\text{Z}}_{\text{eff}}\right)}_{\text{Be}} So, shielding effect is more on 2p electron of B than 2s electron of Be
So,