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प्रश्न
State one chemical test between the following pair:
Sodium carbonate and sodium sulphite
रासायनिक समीकरण/संरचनाएँ
लघु उत्तरीय
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उत्तर
A colourless and odourless gas is produced when sodium carbonate and dil. sulphuric acid are combined; this gas has no effect on acidified potassium dichromate paper.
\[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]
Add sodium sulphite to a diluted solution. Sulphuric acid releases a colourless gas with a burning sulphur odour and changes acidified potassium dichromate paper from orange to green.
\[\ce{Na2SO3 + H2SO4 -> Na2SO4 + H2O + SO2}\]
\[\ce{\underset{(Orange)}{K2Cr2O7} + 3SO2 + H2SO4 -> K2SO4 + \underset{(Green)}{Cr2(SO4)3 + H2O}}\]
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