How many of the following first row d-block elements are stronger reducing agents than copper Sc, TI, V, Cr, Mn, Fe, Co, Ni, Zn.

How many of these metals can show +3 oxidation state also. Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn

How many of the following elements show +2 as their most stable oxidation state ? Sc, Sn, Zn, Be, Pb, Co, Ag, Ti, Fe

Write down the names of crystal structures in which the following elements are presents: Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn

How many of the following show variable oxidation states in their compounds? Sc,Cr,Cu,Zn,Fe,Hg,La

How many of the following ions have the same magnetic moments ? Fe^(2+)Mn^(2+)Cr^(2+)Ni^(2+)

How many of the following metals can be refined by vapour phase refining ? Zn,Zr,Hg,Cd,Ni,Ti,Co,Pt,Fe .

In which of the following paris both the ions are coloured in aqueous solution? (Atomic number, Sc - 21, Ti = 22, Ni = 28, Cu = 29, Co = 27) (a) Ni^(2+), Ti^(3+) (b) Sc^(3+),Ti^(3+) (c) Sc^(3+),Co^(2+) (d) Ni^(2+),Cu^(+)

Ni^(+2) form a complex inon in water having the formula [Ni(H_(2)O)_(6)]^(+2) . How many of the following statement are true for the complex ion ? (i) The complex is octahedral in shape (ii) The complex is diamagnetic in nature . (iii) Ni^(+2) has incompletely filled 3d subshell. (iv). Secodary valency of Ni^(+2) is 6 (v) All the bonds (metal-ligand ) are perpendicular to each other. (vi) All the 3d orbitals of Ni^(+2) are degenerate (vii) Total spin of the complex is 1. (viii) The hybridisation of Ni^(+2) is d^(2)sp^(3) (ix) The complex is more stable than [Ni(en)_(3)]^(+2) (x) Effective atomic number of Ni^(+2) is 36.

How many of the following ions have spin mangnetic moment more than 4 B.M . Ti^(3+), Cu^(+), Ni^(2+),Fe^(3+),Mn^(2+), Co^(2+)

Explain the following observations : (i) Copper atom has completely field d orbitals (3d^(10)) in its ground state, it is regarded as a transition element. (ii) Cr^(2+) is a stronger reducing agent than Fe^(2+) in aqueous solutions.