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IGCSE Chemistry

Paper # 02 Mcqs (Extended) All variants

Prepare smarter for O Levels / IGCSE Chemistry Paper 2 (Objective MCQs) with this complete Extended syllabus preparation session for all variants of the Cambridge Board exams. Here, you will learn important concepts, repeated MCQs, examiner tricks, paper-solving techniques, and time management strategies to score high marks in Chemistry Objectives.

Topic # 4 (Electrochemistry)

IGCSE-Cambridge-P2-Topic#4 (Electrochemistry)

Total 10 MCQs

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1 / 10

In the manufacture of aluminium by electrolysis, aluminium oxide is dissolved in molten cryolite. Why is cryolite used? [June 2019 = P23/Q#10]

A) It makes the aluminium a better conductor

B) It lowers the melting point of the aluminium

C) It removes the impurities from the aluminium,

D) The mixture has a lower melting point than pure aluminium oxide

2 / 10

2) The diagram shows a simple cell. Which metal P produces the smallest voltage? [Nov 2019 = P23/Q#11]

A) Iron

B) Calcium

C) Magnesium

D) Zinc

3 / 10

The diagram shows the electrolysis of an aqueous solution of X using inert electrodes. Hydrogen is produced at the cathode and chlorine is produced at the anode. What is X? [June 2019 = P22/Q#9]

A) dilute hydrochloric acid

B) dilute sodium chloride solution

C) Concentrated hydrochloric acid

D) Concentrated copper (II) chloride solution

4 / 10

An aqueous solution of copper (II) sulfate was electrolyzed using copper electrodes. Which equation for reaction at the anode is correct? [June 2019 = P23/Q#9]

A) Cu + 2e- …………… Cu+2

B) Cu …………… Cu+2 + 2e-

C) Cu+2 + 2e- …………… Cu

D) Cu+2 …………… Cu + 2e-

5 / 10

5) Which row correctly show cathode and anode products from the electrolysis of the named electrolyte? [Nov 2019 = P21/Q#11]

A) 2 and 3 only

B) 1 and 2 only

C) 1 and 4 only

D) 3 and 4 only

6 / 10

When dilute aqueous sodium chloride is electrolyzed using platinum electrodes, what is the half equation for the reaction at cathode? [June 2020 = P21/Q#10]

A) 4OH- …………..> 2H2O + O2 +4e-

B) 2H+ + 2e- ……………> H2

C) 2Cl- ……………..> Cl2 + 2e-

D) Na+ + e- ……………> Na

7 / 10

What are the ionic half-equations for the electrode reactions during the electrolysis of concentrated aqueous sodium chloride? [Nov 2019 = P21/P22/P23/Q#12]

A) A

B) C

C) B

D) D

8 / 10

Aluminium metal is extracted from aluminium oxide by electrolysis. Which ionic half-equation describes a reaction that occurs at the named electrode. [June 2019 = P21/Q#10]

A) Al+3 + 3e- ……………> Al (Anode)

B) Al+3 + 3e- ……………> Al (Cathode)

C) 2O2-2 ……………> O2 + 2e- (Anode)

D) 2O2-2 ……………> O2 + 4e- (Cathode)

9 / 10

Which statement about the electrolysis of copper(II) sulfate solution using carbon electrodes is correct? [June 2019 = P21/Q#9]

A) A colourless gas is produced at the anode

B) A colourless gas is produced at the cathode

C) The mass of both electrodes remains constant

D) The colour of electrolyte remains the same

10 / 10

10) The diagram shows a simple cell. Which pair of metals produces the largest voltage? [Nov 2019 = P22/Q#11]

A) Metal=P (Zinc)………. Metal=Q (Iron)

B) Metal=P (Magnesium)………. Metal=Q (Iron)

C) Metal=P (Zinc)………. Metal=Q (copper)

D) Metal=P (Magnesium)………. Metal=Q (copper)

Your score is

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IGCSE Chemistry

Topic # 4 (Electrochemistry)