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The first (IP₁) and the second (IP₂) ionisation potential (kJ mol^-1) of a few elements designed by roman numerals are shown below
Identify the element which are likely to be a noble gas and a reactive metal respectively

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I and II

I and IV

II and III

II and IV

answer is B.

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Detailed Solution

Noble gases have very high Ionization Potential 2372 from $({IP}_{1})$ and Reactive metals have low Ionaztion potential 520 from $({IP}_{1})$ .

Therefore, Option B is the right answer.

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