STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

$\left[\right.$ Given $: \mathrm{N}_{\mathrm{A}}=6.02 \times 10^{23}\, \mathrm{~mol}^{-1}$, Atomic mass of $\mathrm{Na}=23.0\, \mathrm{u}]$

$(I)\,[Ni(CO)_4]$  $(II)\, [Mn(CN)_6]^{4-}$  $(III)\, [Cr(NH_3)_6]^{3+}$  $(IV) \,[CoF_6]^{3 -}$

$SO _{2} Cl _{2}+2 H _{2} O \rightarrow H _{2} SO _{4}+2 HCl$ $16\,moles$ of $NaOH$ is required for the complete neutralisation of the resultant acidic mixture. The number of moles of $SO _{2} Cl _{2}$ used is.