1.

Distinguish between Sodium carbonate and sodium nitrate.

Answer»

Sodium carbonate when treated with dilute hydrochloric acid, a vigorous reaction takes place and a colourless, odourless gas carbon dioxide is evolved which turns lime water milky.

Na2CO3 + 2HCl  2NaCl + H2O + CO2

Sodium nitrate when mixed with copper  filings and heated with concentrated sulphuric acid, reddish brown fumes of nitrogen dioxide are evolved.

2NaNO3 + H2SO4  Na2SO4  + 2HNO3

Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O.



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