Among the following, the compound that is both are diamagnetic and coloured is
$K_2Cr_2O_7$
$(NH_4)_2[TiCl_6]$
$VOSO_4$
$K_3[Cu(CN)_4]$
Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is $25$
Besides $Zn$ and $Cu$, german silver contains the metal
Which element is alloyed with copper to form bronze
Reactivity of transition elements decreases almost regularly from $Sc$ to $Cu$. Explain.
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is