Can you get electricity from a non-redox reaction? Explain.

Important Questions on Energy Changes, and Reversible Reactions

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 2

In a simple cell, which metal gives up electrons to produce the current: the more reactive or less reactive?

HARD

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 3

A wire connects a strip of magnesium and copper, standing in an electrolyte. Bubbles appear on the copper strip. Why?

HARD

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 4

You connect two strips of iron using wire and stand them in an electrolyte. Will a current flow? Explain your answer.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 5

In a hydrogen fuel cell, what is the fuel? (Hydrogen and Water/ Hydrogen and Oxygen)

HARD

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 5

How are the electrons transferred in hydrogen fuel cell? 

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 5

What type of electrolyte is used in the hydrogen fuel cell?

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 1

What is a reversible reaction?

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 2

Write a word equation for the reaction between solid copper (II) sulphate and water.