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Q.

A, P, X, B and E are the elements belonging to 15th group of Modern periodic table. The correct trend of density in these elements is A > P > X > B > E. The element ‘B’ in the sequence is

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a

P

b

Sb

c

N

d

As

answer is A.

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Detailed Solution

Atomic radius ; NP>As>Sb>Bi ;Melting point…As>Sb>Bi>P>N ;Boiling point….NP>As>Sb=Bi ;
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