Statement 1 : Boron has a smaller first ionisation enthalpy than beryllium.Statement 2 : The penetration of a 2s electron to the nucleus is more than the 2p electron, hence 2p electron is more shielded by the inner core of electrons than the 2s electrons.
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a
Both Statement 1 and Statement 2 are true.
b
Statement 1 is true and Statement 2 is false.
c
Statement 1 is false and Statement 2 is true.
d
Both Statement 1 and Statement 2 are false.
answer is A.
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Detailed Solution
The order of penetrating power of various orbitals is, S>P>d>f ;Penetrating power ∝1screening effect