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Oxidation & Reduction Quiz

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Oxidation & Reduction Quiz

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About this activity

Redox basics practice

Created by

ALDIYAN DOMU HAMANAY
ALDIYAN DOMU HAMANAY
United States

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Oxidation & Reduction Quiz
 

Oxidation & Reduction QuizOnline version

Redox basics practice

by ALDIYAN DOMU HAMANAY
1

True or False: Combustion reactions involve oxygen.

2

Which species is the reducing agent in a redox reaction?

3

In the reaction Fe2O3 + 3CO → 2Fe + 3CO2, what is being reduced?

4

True or False: A molecule of oxygen gas contains two oxygen atoms.

5

What type of reaction is rusting of iron an example of?

6

Which species is the reducing agent in Fe2O3 + 3CO → 2Fe + 3CO2?

7

Which statement describes a reducing agent?

8

True or False: Ions are atoms that have gained or lost protons.

9

True or False: Metals react with acids to form metal oxides.

10

Which substance is oxidised in the following reaction: Mg + CuO → MgO + Cu ?

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Combustion reactions always involve oxygen.

A reducing agent removes oxygen in a reaction. It gets oxidised because it gains oxygen in the process.

Fe from Fe2O3 (focus on the reactant substances only, not the products) is the oxidizing agent. It gets reduced because it loses oxygen in the process.

A molecule of oxygen (O2) gas contains two oxygen atoms.

Rusting of iron: 4Fe + 3O2 + 6H2O→ 4Fe(OH)3 is an example of oxidation reaction when iron (Fe from the reactant) is oxidized / is gained oxygen.

A CO molecule (focus on the reactant substances only, not the products) gets oxidised because it gains oxygen in the process. Therefore, it acts as the reducing agent (removes oxygen from another substance).

A reducing agent removes oxygen in a reaction. The reducing agent gets oxidised because it gains oxygen in the process.

Ions are atoms that have gained or lost electrons, not protons.

Metals react with acids to form salt and hydrogen gas, not metal oxides. Meanwhile, metals react with oxygen that will produce metal oxides, such as 2Zn (s) + O2 (g) → 2ZnO (s) or zinc metal + oxygen gas → zinc oxide.

From Mg + CuO → MgO + Cu: Mg is oxidised because it gains oxygen; CuO is reduced because it loses oxygen; Mg is the reducing agent because it removes oxygen from CuO (focus on the reactants only). Mg gets oxidised because it gains oxygen from CuO. CuO is the oxidizing agent because it provides oxygen (focus on the reactants only). CuO gets reduced because it loses its oxygen to become Cu.

 
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