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>ARCHIVES*(Last 6 Years)>Q 14

MEDIUM

10th ICSE

IMPORTANT

Earn 100

Write equation for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode) during the electrolysis of molten lead bromide with inert electrodes.

Important Questions on Electrolysis

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>ARCHIVES*(Last 6 Years)>Q 15

Give appropriate scientific reasons for the following statement:
Zinc oxide can be reduced to zinc by using carbon monoxide but aluminium oxide cannot be reduced by a reducing agent.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>ARCHIVES*(Last 6 Years)>Q 15

Give appropriate scientific reasons for the following statement:
Carbon tetrachloride does not conduct electricity.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>ARCHIVES*(Last 6 Years)>Q 15

Give appropriate scientific reasons for the following statement:
During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>ARCHIVES*(Last 6 Years)>Q 15

Give appropriate scientific reasons for the following statement:
Electrolysis of molten lead bromide is considered to be a redox reaction.

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 6 - Electrolysis>ARCHIVES*(Last 6 Years)>Q 16

Differentiate between the terms strong and weak electrolytes (stating any two differences).

EASY

10th ICSE