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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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Magnesium produces a gas when added to an acidic solution. If sodium carbonate is added to the same solution, which other gas will be released?

Answer and explanation

Correct answer: Carbon dioxide

The governing concept is that acids react differently with metals and carbonates. Magnesium reacts with an acid to produce hydrogen, for example Mg + 2HCl → MgCl2 + H2. Sodium carbonate reacts with the acid to form a salt, water, and carbon dioxide: Na2CO3 + 2HCl → 2NaCl + H2O + CO2. Thus the second gas is carbon dioxide, so option A is correct; hydrogen belongs to the magnesium reaction, while oxygen and ammonia are not products here.

Related tags

Acid ReactionsCarbonatesCarbon DioxideAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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