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Q.

The first (IP1) and the second (IP2) ionisation potential (kJ mol-1) of a few elements designed by roman numerals are shown below

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Identify the element which are likely to be a noble gas and a reactive metal respectively

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a

I and II

b

I and IV

c

II and III

d

II and IV

answer is B.

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Detailed Solution

Noble gases have very high Ionization Potential 2372 from IP1 and Reactive metals have low Ionaztion potential 520 from IP1.

Therefore, Option B is the right answer.

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