HARD
Upper Secondary: IGCSE
IMPORTANT
Earn 100

CopperII ions are blue. When copperII sulphate solution is electrolysed, the blue solution keeps its colour when copper electrodes are used. Explain the observation.  

Important Questions on Electricity and Chemical Change

HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 2

If you want to purify a metal by electrolysis, will you make it the anode or the cathode? Why? 

HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 3
Describe the process of refining copper. 
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 4
What does electroplating mean? 
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 5

Steel cutlery is often electroplated with nickel. Why?