MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Earn 100

Naphthalene is a molecular substance. Do you think it will conduct electricity when molten? Explain. 

Important Questions on Electricity and Chemical Change

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 5

What is an electrolyte? Give three examples of it. 

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 5

What is non-electrolyte? Give three examples of it. 

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 1
Which type of compounds can be electrolysed? Why? 
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 1
What form a compound must be in that can be electrolysed?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 2

What does the electrolysis of this molten compound give?  

Aluminium oxide, Al2O3.

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

What does the electrolysis of this molten compound give?  

Calcium fluoride, CaF2. 

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

What does the electrolysis of this molten compound give?  

Lead sulphide, PbS. 

HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 8 - Electricity and Chemical Change>Q>Q 3

Name the products at each electrode, when this aqueous solution is electrolysed using an inert electrode: 

a concentrated solution of magnesium chloride, MgCl2.