Statement 1 : Helium has the highest value of ionisation energy among all known elements.Statement 2 : Helium has the highest value of electron affinity among all known elements.
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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 B.
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Detailed Solution
(1) ‘He’ contains fully filled 1s2 orbital which has more penetrating effect and is very close to the nucleus and hence has higher value of Ionization energy.(2) E.A of ‘He’ is zero.
Statement 1 : Helium has the highest value of ionisation energy among all known elements.Statement 2 : Helium has the highest value of electron affinity among all known elements.