Most stable cation in aqueous medium is
$Cr^{2+}$
$V^{3+}$
$Cr^{3+}$
$Mn^{2+}$
Transition element makes complex compound due to
Which one of the following properties is not of transition elements
Which does not form amalgam
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
A nitrate when mixed with common salt gives a white precipitate which is soluble in dilute $N{H_4}OH$. It is the nitrate of