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Chemical Reaction: Copper Oxide Reduction

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Chemical Reaction: Copper Oxide Reduction

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Questions and Answers

What type of reaction occurs when a single substance decomposes to give two or more substances?

Double displacement reaction

Decomposition reaction (correct)

Combination reaction

Exothermic reaction

In which type of reaction does a displacement reaction occur when an element displaces another element from its compound?

Decomposition reaction

Precipitation reaction

Combination reaction

Reduction reaction (correct)

What is oxidation defined as in a chemical reaction?

Gain of oxygen (correct)

Gain of hydrogen

Loss of hydrogen

Loss of oxygen

Which type of reactions produce insoluble salts?

Precipitation reactions Signup and view all the answers

In an exothermic reaction, what is characteristic of the heat?

Heat is released Signup and view all the answers

What is reduction defined as in a chemical reaction?

Loss of hydrogen Signup and view all the answers

What happens to a substance if it gains oxygen during a reaction?

It is oxidised Signup and view all the answers

If a substance loses oxygen during a reaction, what is the term used to describe this process?

Reduced Signup and view all the answers

In the reaction MnO2 + 4HCl → MnCl2 + 2H2O + Cl2, what is happening to MnO2?

It is reduced Signup and view all the answers

During the reaction ZnO + C → Zn + CO, what is happening to ZnO?

It is reduced Signup and view all the answers

If a substance gains oxygen or loses hydrogen during a reaction, what is the term used to describe this process?

Oxidised Signup and view all the answers

When a magnesium ribbon burns with a dazzling flame in air and changes into magnesium oxide, is magnesium being oxidised or reduced?

Oxidised Signup and view all the answers

In the reaction 2PbO(s) + C(s) → 2Pb(s) + CO2(g), which statement is incorrect?

Carbon dioxide is getting oxidised. Signup and view all the answers

What type of reaction is Fe2O3 + 2Al → Al2O3 + 2Fe?

Displacement reaction. Signup and view all the answers

When dilute hydrochloric acid is added to iron fillings, what is produced?

Hydrogen gas and iron chloride. Signup and view all the answers

What is the purpose of balancing a chemical equation?

To ensure the mass is conserved in the reaction. Signup and view all the answers

Which statement can be correctly translated into a balanced chemical equation?

Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. Signup and view all the answers

Balance the following chemical equation: BaCl2 + H2SO4 → BaSO4 + HCl.

BaCl2 + 2H2SO4 → Ba(SO4)2 + 2HCl Signup and view all the answers