pBlock ElementsII 1 Question 99

97. Write the balanced chemical equations for the following.

(i) Hypophosphorous acid is heated.

(ii) Sodium chlorate reacts with sulphur dioxide in dilute sulphuric acid medium.

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Solution:

  1. (i) $\underset{\text{hypophosphorus acid}}{2 \mathrm{H}_3 \mathrm{PO}_2} \quad \xrightarrow{\Delta} \mathrm{PH}_3+\mathrm{H}_3 \mathrm{PO}_4$ (Disproportionation)

(ii) $\mathrm{NaClO}_3+\mathrm{SO}_2 \xrightarrow{10 \mathrm{H}^{+}} \mathrm{NaCl}+\mathrm{S}+5 \mathrm{H}_2 \mathrm{O}$