Out of the ions `Ag^+`, `Co^(2+)` and `Ti^(4+)` which will give coloured aqueous solution and what will be the magnetic behaviour of each ion ? (Atomic number of Ag = 47, Co = 27 and Ti = 22).

Out of the ions Ni^(2+) , Zn^(2+) and Cu^2+) , which will give coloured aqueous solution and what will be the magnetic beghaviour of each ion ? (Atomic number of Ni = 28, Zn =30 and Cu = 29).

Out of ions Co^(2+) ,Cr^(3+), ( Sc^(3+) which will give coloured aqueous solution and what will be the magnetic behaviour of each ion ? (Atomic number of Co = 27, Sc = 21 and Cr = 24).

Out of Co^(2+) , Zn^(2+) and Cu^+(2+) which will give aqueous coloured solution ?

Out of Ag^+ and Co^(2+) which one will be coloured and why? (Atomic number of Ag is, 47 and Co is 27).

Give the formula of the following coordination entities - Ni^(2+) ion is bound to two water molecules and two oxalate ions. Write the name and magnetic behaviour of the above coordination entities. (At. nos, Co = 27, Ni = 28)

Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25.

Magnetic moment 2.84 B.M. is given by: (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

Magnetic moment 2.84 B.M. is given by: (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

The d-electron configurations of Cr^(2+), Mn^(2+), Fe^(2+) and Co^(2+) are d^4,d^5,d^6 and d^7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour ? (At. nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)