SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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MgCo3
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SO3 + H2O
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2 Mg + O2
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None of the above
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Detailed explanation-1: -Answer and Explanation: We can see in the above reaction that magnesium oxide reacts with carbon dioxide to form magnesium carbonate. In this reaction, two reactants combined together to form only one product. This type of reaction is known as a combination reaction.
Detailed explanation-2: -Since the above chemical reaction involves the formation of two products, i.e., MgO M g O and CO2 C O 2 from a single reactant MgCO3 M g C O 3, therefore, this reaction is a decomposition reaction.
Detailed explanation-3: -MgCO 3 → MgO + CO 2 (H = +118 kJ/mol) The decomposition temperature is given as 350 °C (662 °F).
Detailed explanation-4: -Solution : Magnesite decomposes on heating to give magnesia and carbon dioxide. <br> ‘MgCO (3)rarrMgO+CO (2)‘ <br> Here there is no change in oxidation numbers. This decomposition is not a redox reaction.