Question 1

Which of the following metals will NOT react with cold water or steam under normal conditions?

Accepted Answer

Copper

Question 2

A strip of magnesium is placed in a solution of copper(II) sulfate. What will you observe, and why?

Accepted Answer

Copper is displaced and forms a brown solid, because magnesium is more reactive.

Question 3

Which equation correctly represents the reaction of magnesium with steam?

Accepted Answer

$$Mg(s) + H_2O(g) \rightarrow MgO(s) + H_2$(g)$$

Question 4

Which of the following statements best describes oxidation in terms of electron transfer?

Accepted Answer

Oxidation is the loss of electrons.

Question 5

Iron rusts when exposed to which of the following conditions?

Accepted Answer

Both water and oxygen

Question 6

Which method provides sacrificial protection to iron?

Accepted Answer

Attaching a block of zinc to the iron

Question 7

Which of the following is the correct ionic equation for the displacement reaction between magnesium and copper(II) sulfate?

Accepted Answer

$$Mg(s) + Cu$$^{2+}$$(aq) \rightarrow Mg$$^{2+}$$(aq) + Cu(s)$$

Question 8

Which of the following best describes a reducing agent?

Accepted Answer

A substance that loses electrons and is oxidized

Question 9

Why does galvanizing iron with zinc prevent rusting, even if the zinc layer is scratched?

Accepted Answer

Zinc is more reactive than iron and acts as a sacrificial anode.

Question 10

Which of the following metals is the least reactive according to the reactivity series?

Accepted Answer

Gold

Question 11

A student adds dilute hydrochloric acid to a piece of zinc. Which gas is produced?

Accepted Answer

Hydrogen

Question 12

Which of the following is NOT a method for preventing the rusting of iron?

Accepted Answer

Wrapping with copper wire

Question 13

Which of the following best describes a spectator ion?

Accepted Answer

An ion that does not change during a reaction

Question 14

Which of the following metals would react most vigorously with cold water?

Accepted Answer

Potassium

Question 15

Which of the following is the correct word equation for the reaction of iron with steam?

Accepted Answer

Iron + steam $$\rightarrow$$ iron(III) oxide + hydrogen

Question 16

Which of the following statements is TRUE about the reaction of aluminium with dilute acids?

Accepted Answer

Aluminium reacts slowly at first due to a protective oxide layer, then vigorously once the layer is removed.

Question 17

Which of the following is the correct half-equation for the reduction of copper(II) ions to copper metal?

Accepted Answer

$$Cu^{2+} + 2e$$^- \rightarrow Cu$$

Question 18

Which of the following best explains why copper pipes are used for both hot and cold water?

Accepted Answer

Copper does not react with water or steam.

Question 19

Which of the following is the correct balanced equation for the reaction of zinc with steam?

Accepted Answer

$$Zn(s) + H_2O(g) \rightarrow ZnO(s) + H_2$(g)$$

Question 20

Which of the following metals can be used as a sacrificial anode to protect iron from rusting?

Accepted Answer

Zinc

Reactivity Series, Displacement Reactions, and Redox Chemistry

Study Guide - Practice Questions