If the colours of salts of transition elements are due to the presence of unpaired electrons in the transition metal ions, which of the following ions will be colourless in aqueous solution
$T{i^{3 + }}$
$T{i^{4 + }}$
$F{e^{2 + }}$
$F{e^{3 + }}$(The at. no. of $Ti$ and $Fe$ are $22$ and $ 26$ respectively)
In which pair of ions both are diamagnetic in nature?
When an acidified solution of ferrous ammonium sulphate it treated with potassium permanganate solution, the ion which is oxidised is
The oxoanion in which the oxidation state of the central atom is same as its group number in the periodic table is
Which of the following is not a characteristic of transition element
Many transition metals form interstitial compounds. The characteristics of these interstitial compounds are
$(I)$ They have high melting points, higher than those of pure metals
$(II)$ They are very hard
$(III)$ They retain metallic conductivity
$(IV)$ They are chemically more reactive than the pure metals