For the electro-refining of copper, what is the cathode made up of?

In the electro-refining of copper, the cathode is made up of pure thin sheet of copper and the anode is made up of impure plate of copper and the electrolyte used here is aqueous copper sulphate solution.

Give a reason for the following. Conductivity of dilute hydrochloric acid is greater than that of acetic acid.

HCl is a strong electrolyte and hence it can dissociate completely in aqueous solution which make it a good conductor of electricity whereas acetic acid is a weak electrolyte and it partially dissociates into ions which makes it a poor conductor than dilute hydrochloric acid.

E M B I B E

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 1

MEDIUM

10th ICSE

IMPORTANT

Earn 100

Metals are called electropositive elements and nonmetals are called electronegative elements. Explain on the basis of their activity in an electrolytic cell.

Important Questions on Electrolysis

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 2

Common salt is a bad conductor of electricity in solid form but conducts electricity when present in an aqueous state or in molten state. Why?

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 3

Explain ionisation of

HCl

in an aqueous state.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 4

Give one point of difference between ionisation and dissociation.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 5

Why iron decolourises the blue colour of copper sulphate solution but silver does not?

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 02>Q 6

During electrolysis of copper sulphate and sodium chloride in an aqueous medium, name the cations which would be preferably discharged at the cathode.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 03>Q 1

Name the anions and cations deposited at the respective electrodes during the following electrolysis:
Electrolysis of molten lead bromide.

HARD

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 03>Q 1

Name the anions and cations deposited at the respective electrodes during the following electrolysis:
Electrolysis of aqueous copper sulphate using copper electrodes.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>CHECK POINT 03>Q 2

Give the overall reaction for the electrolysis of molten lead bromide.