lCIILIS(2) Br-,ă(3) CCsIn which of the following pairs of element

1.	lCIILIS(2) Br-,ă(3) CCsIn which of the following pairs of elements theelectronegativity of first element is less than thatof second element :-Zr, Hf(2) K, Rb(3) Cl, S(4) of the above
Answer» electronegativity decreases down to group.. and increases from left to right in the periodic table.so, K > Rb and.. Cl > S but due to d-contraction... electronegativity of Zr<Hf. so. option 1.

lCIILIS(2) Br-,ă(3) CCsIn which of the following pairs of elements theelectronegativity of first element is less than thatof second element :-Zr, Hf(2) K, Rb(3) Cl, S(4) of the above

Answer»

electronegativity decreases down to group.. and increases from left to right in the periodic table.so, K > Rb and.. Cl > S

but due to d-contraction... electronegativity of Zr<Hf.

so. option 1.