Solution:
Atomic radius trend…C<Si<Ge<Sn<Pb;
IP1 and 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
R, P, A, Y and D are the elements belonging to 14th group of Modern periodic table. The correct trend of electronegativity for these elements is R > P > A = Y = D. The element ‘A’ in the sequence is
R, P, A, Y and D are the elements belonging to 14th group of Modern periodic table. The correct trend of electronegativity for these elements is R > P > A = Y = D. The element ‘A' in the sequence is
