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Write balanced chemical equation for the...

Write balanced chemical equation for the following :
(a) NaCl is heated with sulphuric acid in the presence of `MnO_(2)`
(b) Iodine is treated with Conc. `HNO_(3)`.

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(a) `2NaCl+MnO_(2)+3H_(2)SO_(4) to 2NaHSO_(4) +MnSO_(4) +Cl_(2) +2H_(2)O`
(b) `I_(2) +10HNO_(3) to 2HIO_(3) +10NO_(2) +4H_(2)O`.
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