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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Statement 1 is false and Statement 2 is true.

Statement 1 is true and Statement 2 is false.

Both Statement 1 and Statement 2 are false.

Both Statement 1 and Statement 2 are true.

answer is B.

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Detailed Solution

(1) ‘He’ contains fully filled $1 s^{2}$ 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.

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