The reaction between a liquid substance 'M' and sodium trioxocarbonate (IV) gives a gas which turns limewater milky. Therefore 'M' is? (a) H2SO4 (b) Na2SO4 (c) KL (d) NaOH

1 Answer
Oscar L.
Jul 8, 2018

Of the given choices only sulfuric acid, choice (a), reacts as given in the problem.

Explanation:

Sodium trioxocarbonate(IV) is a fancy name for just sodium carbonate, #"Na"_2"CO"_3#. The "IV" comes from the carbon, of course, having an oxidation state of +4.

Carbonated react with acids to make carbon dioxide which, indeed, "turns limewater milky". Of your given liquids only one is an acid so choose that one.

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