Fe can displace which of the following ions from their aqueous solutions?
(a) `Na^(+)` (b) `Zn^(2+)` (c) `Cu^(2+)` (d) `Ag^(+)`

Which of the following displaces Br_(2) from an aqueous solution containing bromide ions ?

H_(2) can displace the metal from its aqueous solution.

Which one of the following transition metal ions is diamagnetic? Co^(2+) , Ni^(2+) , Cu^(2+) , Zn^(2+)

On the basis of standard electrode potential values,suggest which of the following reactions would take place? (Consult the book for E^(ϴ) value) (a) Cu+Zn^(2+)toCu^(2+)+Zn (b) Mg+Fe^(2+)toMg^(2+)+Fe (c ) Br_(2)+2Cl^(-)toCl_(2)+2Br^(-) (d) Fe+Cd^(2)toCd+Fe^(2+)

Considering Ellingham diagram, which of the following metals can be used to reduce alumina? (a)Mg (b)Zn (c)Fe (d)Cu

Give the characteristic coordination number of each of the following central metal ions . (a) Cu(I) (b)Cu(II) (c ) CO(III) (d) AI(III) (e) Zn(II) (f) Fe(II) (g) Fe(III) (h) Ag(I) .

Write the electronic configuration of the following and report the number of unpaired electron in each a. Mn^(2+) b. Cr^(2+) c Fe^(2+) d. Ni^(2+) e. CI^(2+) f. Zn^(2+) g. Fe^(2+) h Na i. Mg .j Cr(3+)

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^(+)

Which of the following is/are Dobereiner's triad? (a) Li, Na, K (b) Cu, Ag, Zn (c) Fe, Co, Ni (d) Ca, Sr, Ba Correct answer is

State the reason for the following : (i) Cu (I) ion is not stable in an aqueous solution. (ii) Unlike Cr^(3+),Mn^(2+),Fe^(3+) and the subsequent other M^(2+) ions of the 3d series, the 4d and 5d series metals generally do not form stable oxidation states.