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A, P, X, B, Q and E are the elements belonging to 18th group of Modern periodic table. The correct trend of boiling point in these elements is A > P > X > B > Q > E. The element ‘B’ in the sequence is

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By Expert Faculty of Sri Chaitanya
a
Xe
b
Rn
c
Kr
d
Ar

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detailed solution

Correct option is D

Atomic radius….HeNe>Ar>Kr>Xe>Rn;Positive electron gain enthalpy ….Ne>Ar=Kr>Xe>Rn>He;Due to stable configurationMP and BP…..HeNe>He>Kr>Xe;


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