Identify the correct statement among the following.

Identify the correct statements among the following I) The transition elements have partially filled (n-l) d orbitals. II) Cu is a better conductor of electricity than that of Ag. III) Sc^(+3), zn^(+2) are diamagnetic whereas Ti^(+4) is paramagnetic. IV) Transitional elemelilts are less electro-positive than alkalimetals

Identify the correct statements among the following I) Cr in first series of d-block has highest oxidation state. II) Colour of MnO_(4)^(-) is due to charge transfer phenomenon. III) Zn can show variable oxidation state. IV) Ferromagnetism disappears in the solution of Fe

Identify the correct statements among the following I) Both Cr and Cu show +1 oxidation state II) The complementary colour of absorbed green colour of visible radiation is purple. III) Ni^(+2) ion in its hydrated state exhibits green colour IV) Devarda's alloy contains least percentage of 'Zn