Which of the following transition metal is used as a catalyst
Nickel
Cobalt
Gold
Both $(a)$ and $(b)$
A blue colouration is not obtained when
In nitroprusside ion, the iron exists as $Fe^{2+}$ and $NO$ as $NO^+$ rather than $Fe^{3+}$ and $NO$ respectively. These forms of ions are established with the help of
Which of the following will give green hydrated ion
Which of the following statement is Correct
The correct statement in respect of $d-$ block elements