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Identify the type of reaction: (i) CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) (ii) 2NaCI (l) \(\overset{Electric\,current}\longrightarrow\) 2Na(s) + Cl2(g) (iii) MnO2 + 4HCI MnCl2 + 2H2O+ Cl2 |
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Answer» (i) CH4(g) + 2O2 (g) → CO2 (g) + 2H2O (g): This is an example of Exothermic reaction because it leads to release of HEAT as can be seen water is given in gaseous form. (ii) 2NaCI (l) \(\overset{Electric \,current}\longrightarrow\) 2Na (s) + Cl2 (g) : This is the example of Decomposition reaction of common salt using electricity. This reaction is also called Electrolysis of Bryn solution. (iii) MnO2 + 4HCI → MnCl2 + 2H2O+ Cl2 This reaction is the example of a redox reaction. Because MnO2 has donated its oxygen atoms and hence got reduced. Also, Chlorine is converted into Clto form Cl2 and hence get oxidised. Since both oxidation and reduction has taken place. This is a redox reaction. |
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