WorksheetsChemy 8 Form 4: Electrochemistry
Total questions: 10
Worksheet time: 5mins
Diagram shows the set up of the apparatus for electrolysis.
Which of the following compounds could be used as substance X?
Glucose solution, C6H12O6
Sodium chloride solution, NaCl
Chloromethane, CH3Cl
Ethyl ethanoate, CH3COOC2H5
What are the ions present in molten sodium chloride and aqueous sodium chloride?
A
B
C
D
Which of the following ions present in the copper(II) sulphate solution?
Cu2+, SO42-, H+ and OH- ions
Cu2+ and SO42- ions
H+ and OH- ions
Cu2+ and H+ ions
Diagram shows the apparatus set up for electrolysis of 0.001 mol dm-3 hydrochloric acid.
What is formed at carbon G?
Chlorine gas
Oxygen gas
Hydrogen gas
Hydrogen chloride gas
Which bulb in the following circuits will light up?
A
B
C
D
Diagram shows an electrolytic circuit using solid sodium chloride. The bulb in the circuit does not light up.
Which of the following changes would cause the bulb to light up?
Add more solid sodium chloride into the beaker
Add water to the solid sodium chloride
Add ethanol to the solid sodium chloride
Replace the carbon electrodes with copper electrodes
Diagram shows an electrolytic circuit using inert electodes.
At which electrode is metal deposited?
A
B
C
D
Which anion present in zinc sulphate solution?
SO42-
Zn2+, H+
OH- , SO42-
Zn2+, SO42 , H+, OH-
Based on diagram, what is the half equation at anode?
Pb2+ + 2e ——-> Pb
2Br- ——> Br2 + 2e
H+ + 2e ——> H2
4OH- ——> 2H2O + O2 + 4 e
