The "spin-only" magnetic moment [ in units of Bohrmagneton, $(\mu _B )$ ] of $Ni^{2+}$ in aqueous solution would be (At. No. $Ni= 28)$
$6$
$1.73$
$2.84$
$4.90$
For the following Assertion and Reason, the correct option is
Assertion : For hydrogenation reactions, the catalytic activity increases from Group $5$ to Group $11$ metals with maximum activity shown by Group $7-9$ elements.
Reason : The reactants are most strongly adsorbed on group $7-9 $ elements.
Due to covalent bonding, the transitional metals are
Which of the following is expected to form colourless complex
German silver is an alloy of
Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?