Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.

Predict which of the following will be coloured in aqueous solution ? Ti^(3+), V^(3+) , Sc^(3+) , Fe^(3+) , Co^(2+) and MnO_4^Theta

Which of the following on boiling with Na_2CO_3 (aq) gives aniline?

Which of the following ions are expected to be coloured ? Ni^(2+), Ti^(3+), Cu^(+), Sc^(3+), Zn^(2+)

Which of the following has maximum number of unpaired electrons ? Ti^(3+), V^(3+), Fe^(2+),Mn^(2+)

Which of the following gives iodoform on heating with a solution of I_2 containing Na_2CO_3 ?

Write down the number of 3d electrons in each of the following ions: Tiz+, V2+, Cr3+, Mn2*, Fe2+, Fe3+, Co2+, Ni2+ and Cu2+. Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral).

Which of the following is magnetite? Fe_3O_4 , Fe_2O_3 , Fe_2O_3 3H_2O , Fe_2CO_3 .

Giving reasons indicate which one of the following would be coloured ? Cu^(+), VO^(2+), Sc^(3+), Ni^(2+) (At. no. of Cu = 29, V = 23, Sc = 21, Ni = 28)

Which of the following is amphoteric oxide? Mn_2O_7, CrO_3, Cr_2O_3, CrO, V_2O_5, V_2O_4