pBlock ElementsII 1 Question 97
93. Write the balanced chemical equation for the following reactions.
(i) Aqueous solution of sodium nitrate is heated with zinc dust and caustic soda solution.
(ii) Sodium iodate is added to a solution of sodium bisulphite
(1990, 2M)
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Solution:
- (i) $\mathrm{NaNO}{2}+\mathrm{Zn}+\mathrm{NaOH} \longrightarrow 3 \mathrm{Na}{2} \mathrm{ZnO}{2}+\mathrm{NH}{3}+\mathrm{H}_{2} \mathrm{O}$
(ii) $2 \mathrm{NaIO}{3}+5 \mathrm{NaHSO}{3} \longrightarrow 3 \mathrm{NaHSO}{4}+2 \mathrm{Na}{2} \mathrm{SO}_{4}$
