Which group contains coloured ions out of the following?
$$\eqalign{
& \left( {\text{i}} \right)C{u^ + } \cr
& \left( {{\text{ii}}} \right)T{i^{4 + }} \cr
& \left( {{\text{iii}}} \right)C{o^{2 + }} \cr
& \left( {{\text{iv}}} \right)F{e^{2 + }} \cr} $$
A.
(i), (ii), (iii), (iv)
B.
(iii), (iv)
C.
(ii), (iii)
D.
(i), (ii)
Answer :
(iii), (iv)
Solution :
Colour of transition elements are due to presence of unpaired electrons.
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is