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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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Magnesium and calcium carbonate are added separately to an acidic solution. What is the correct order of gases formed?

Answer and explanation

Correct answer: Hydrogen and carbon dioxide

Magnesium reacts with a dilute acid by displacement, producing a salt and hydrogen gas; for example, Mg + 2HCl → MgCl2 + H2. Calcium carbonate reacts with acid to produce a salt, water, and carbon dioxide; CaCO3 + 2HCl → CaCl2 + H2O + CO2. Therefore, in the stated order, the gases are hydrogen and carbon dioxide, so option A is correct.

Related tags

Acid ReactionsMagnesiumCalcium CarbonateAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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  1. 1What type of substance turns blue litmus paper red?
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