iGCSE Chemistry metal reactivity (Edexcel)

Which substance will not conduct electricity?

• aluminium

• copper

• plastic

• Steel

Which reaction shows an oxidation reaction?

• C + O₂ → CO₂

• CaCO₃ → CaO + CO₂

• CaO + 2HCl→ Ca Cl₂ + H₂ O

• N₂O₄ → 2NO₂

W,X,Y and Z are metals. Some of the properties of these metals are listed

1. Only W and Z can be extracted by reduction of their oxides with carbon

2. Only X will react iwth cold water

3. Only Z can be found 'native' (not combined with any other element)

What is the correct order of these metals in the reactivity series (least reactive first)

• X,W,Y,Z

• X,Y,W,Z

• Z,W,Y,X

• Z,Y,W,X

Which statement about rusting is not correct?

• Only oxygen is needed for rusting

• Painting can stop iron gates from rusting

• Rust in hydrated iron (III) oxide

• Salt can speed up the rate of rusting.

Which equation shows reduction

• Fe²⁺ + e^- → Fe³⁺

• Fe²⁺ → Fe³⁺ + e^-

• Fe³⁺ + e^- → Fe²⁺

• Fe³⁺ → Fe²⁺ + e^-

A student investigated the reaction of four metals R, S,T and U with solutions of their salts.

What is the order of reactivity?

• R → S → U → T

• R → T → U → S

• S → U → T → R

• U → R → T → S

Some reactions of three metals and their oxides are shown. What is the order of reactivity - least reactive first?

• S,T,U

• S, U, T

• T,S, U

• U , T, S

An example of a redox reaction is shown.

Zn + Cu²⁺ → Zn²⁺ + Cu

• Zn in the oxidising agent and oxidises Cu²⁺

• Zn in the oxidising agent and reduces Cu²⁺

• Zn in the reducing agent and oxidises Cu²⁺

• Zn in the reducing agent and reduces Cu²⁺

A steel bicycle which has been left outdoors for several months is starting to rust. What would not reduce the rate of corrosion?

• Remove the rust and paint the bike

• Remove the rust and store the bicycle in a dry shed

• Remove the rust and wipe the bicycle with a clean, damp cloth

• Remove the rust and wipe the bicycle with an oily cloth

(a)   iron is iron that has been coated in a layer of zinc