Science
Identify the type of reaction :
(a)
(b)
(c)
Chemical Reaction
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Answer
(a) Redox reaction.
Explanation — In this reaction, carbon reduces zinc oxide (ZnO) to zinc (Zn) while itself gets oxidized to carbon monoxide (CO). Hence, both oxidation and reduction occur simultaneously, which characterizes a redox process.
(b) Decomposition reaction.
Explanation — In this reaction, zinc carbonate (ZnCO3) breaks down on heating to form zinc oxide (ZnO) and carbon dioxide (CO2). It is also an endothermic reaction because heat energy is absorbed during the decomposition process.
(c) Combination reaction.
Explanation — In this reaction, magnesium (Mg) combines with oxygen (O2) to form magnesium oxide (MgO). It is also an exothermic reaction because a large amount of heat and light is released during the formation of magnesium oxide.
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