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P, X, A, Y, Q and D (Both Graphite and Diamond included) are the elements belonging to 14^th group of Modern periodic table. The correct trend of densityfor these elements is P < X < A < Y < Q < D. The element ‘Q’ (or the allotrope of the element) in the sequence is

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Diamond

answer is C.

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Detailed Solution

Atomic radius trend…C<Si<Ge<Sn<Pb;

IP₁and M.P trend…C>Si>Ge>Pb>Sn;

EN trend…C>Pb>Si=Ge=Sn;

Density…..C(graphite)<Si<C(diamond)<Ge<Sn<Pb;

B.P trend…C>Si>Ge>Sn>Pb;

Resistivity…C>Si=Ge>Pb>Sn;

Conductivity…C<Si=Ge<Pb<Sn

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