নিম্ললিখিত বিক্রিয়া গুলি সম্পূর্ণ কর।

(a) $4 \mathrm{Fe}_{(\mathrm{aq})}^{3+}+3 \mathrm{~K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \rightarrow$

(b) $2 \mathrm{~K}_{2}\left[\mathrm{HgI}_{4}\right]_{(\mathrm{aq})}+2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow$

(c) $\mathrm{P}_{4(\mathrm{~s})}+3 \mathrm{OH}_{(\mathrm{aq})}^{-}+3 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \stackrel{\Delta}{\longrightarrow}$

(d) $\mathrm{SeO}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow$

(a) $4 \mathrm{Fe}_{(\mathrm{aq})}^{3+}+3 \mathrm{~K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \rightarrow \mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}+12 \mathrm{~K}^{+}$

(b) $2 \mathrm{~K}_{2}\left[\mathrm{HgI}_{4}\right]_{(\mathrm{aq})}+2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow \mathrm{NH}_{2}\left[\mathrm{Hg}_{2} \mathrm{I}_{3}\right]+\mathrm{NH}_{4} \mathrm{I}+4 \mathrm{KI}$

(c) $\mathrm{P}_{4(\mathrm{~s})}+3 \mathrm{OH}_{(\mathrm{aq})}^{-}+3 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \stackrel{\Delta}{\longrightarrow} \mathrm{PH}_{3}+3 \mathrm{H}_{2} \mathrm{PO}_{2}^{-}$

(d) $\mathrm{SeO}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2} \mathrm{SeO}_{3}$.