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Copper is a metal that does not react with water or steam. This means it is a good metal for water pipes.

Reactions, Equations and Formulae

This Science quiz is called 'Reactions, Equations and Formulae' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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In this reactions, equations and formulae quiz, you will need to know the symbols for elements. Your Science teacher will have taught you that when atoms of two or more elements join together, a chemical reaction has taken place.

How will you react to the questions in this quiz all about Reactions, Equations and Formulae?

Which of the following metals is the most reactive with acids?

Aluminium

Iron

Magnesium

Zinc

When a metal reacts with dilute acids hydrogen is produced

2H₂SO₄ means 2 molecules of sulphuric acid. They contain .......

2 hydrogen atoms, 1 sulfur atom, 4 oxygen atoms

4 hydrogen atoms, 1 sulfur atom, 4 oxygen atoms

4 hydrogen atoms, 2 sulfur atoms, 8 oxygen atoms

4 hydrogen atoms, 4 sulfur atoms, 8 oxygen atoms

The formula for copper nitrate is Cu(NO₃)₂. This means .......

1 copper atom, 1 nitrogen atom, 6 oxygen atoms

1 copper atom, 2 nitrogen atoms, 3 oxygen atoms

1 copper atom, 2 nitrogen atoms, 6 oxygen atoms

2 copper atoms, 2 nitrogen atoms, 6 oxygen atoms

The formula for calcium hydroxide is Ca(OH)₂. This means .......

1 calcium atom, 1 oxygen atom, 2 hydrogen atoms

1 calcium atom, 2 oxygen atoms, 1 hydrogen atom

1 calcium atom, 2 oxygen atoms, 2 hydrogen atoms

2 calcium atoms, 2 oxygen atoms, 2 hydrogen atoms

Multiply everything inside the bracket by the number outside

Which of the following is the correct balanced equation?

2 Cu + O₂ → Cu₂O₂

2 Cu + O₂ → 2 CuO

Cu + O → CuO

Cu + O₂ → CuO₂

Which of the following metals do NOT react with water or steam?

Aluminium

Copper

Tin

Zinc

During a chemical reaction new substances are formed from old ones. Which of the following is NOT true?

New substances can be changed back to the original ones

The total mass of products = total mass of reactants

There is often a color change

There is often a temperature change

The change is not reversible under normal conditions

In the following reaction which are the products Mg + 2HCl → H₂ + MgCl₂?

Hydrochloric acid and magnesium chloride

Hydrogen and magnesium chloride

Magnesium and hydrochloric acid

Magnesium and hydrogen

When zinc carbonate reacts with dilute hydrochloric acid the products are .......

carbon dioxide, water

zinc chloride, carbon dioxide

zinc chloride, carbon dioxide, water

zinc sulfate, carbon dioxide, water

A carbonate + dilute acid always produces a salt + carbon dioxide + water

10.

The formula for potassium nitrate is KNO₃. This means .......

1 potassium atom, 1 nitrogen atom, 3 oxygen atoms

1 potassium atom, 3 nitrogen atoms, 3 oxygen atoms

3 potassium atoms, 3 nitrogen atoms, 3 oxygen atoms

3 potassium atoms, 3 nitrogen atoms, 9 oxygen atoms

Author: Sue Davison

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