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प्रश्न
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
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उत्तर
`"Na"_2"SO"_3` + 2HCI `→` 2NaCI + `"H"_2"O"` +`"SO"_2`
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