${MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)$

Identify the oxidising and reducing agents in the above reaction. Give an example of a decomposition reaction.
[2 Marks]

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Solution

1. ${MnO}_{2}$ loses oxygen, therefore it is reduced, and thus it acts as an oxidizing agent.
[0.5 Marks]
2. $HCl$ loses hydrogen. It itself is oxidized, thus it acts as a reducing agent.
[0.5 Marks]
Therefore, in the reaction, ${MnO}_{2}$ is oxidizing agent and $HCl$ is reducing agent.
3. Example of a decomposition reaction: Calcium carbonate decomposes on heating and forms calcium oxide and carbon dioxide gas.

${CaCO}_{3} (s) Heat - - \to CaO(s) + {CO}_{2} (g)$
[1 Mark]

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Similar questions

Q. Chlorine is prepared in the laboratory by treating manganese dioxide

({M n O}_{2})

with aqueous hydrochloric acid according to the reaction:

4 H C l (a q) + {M n O}_{2} (s) \to 2 H_{2} O (I) + {M n C l}_{2} (a q) + {C l}_{2} (g)

How many grams of

H C l

react with 5.0 g of manganese dioxide ?

{MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)

Identify the oxidising and reducing agents in the above reaction.

In the following reaction:
$M n O_{2} (s) + 4 H C l (a q) \to M n C l_{2} (a q) + C l_{2} (g) + 2 H_{2} O (l)$
Identify the oxidising and reducing agents.

{MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)

In the above reaction, which one of them is getting reduced?

{MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)

In the above reaction, which one of them is getting reduced?

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MnO2(s)+4HCl(aq)→MnCl2(aq)+Cl2(g)+2H2O(l) Identify the oxidising and reducing agents in the above reaction. Give an example of a decomposition reaction. [2 Marks]

${MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)$

Identify the oxidising and reducing agents in the above reaction. Give an example of a decomposition reaction.
[2 Marks]