Electrolysis-10th ICSE

Which statement correctly describes the 2 electrodes?

• The anode is negative and the cathode is positive
• The anode and cathode are both positive
• The anode is positive and the cathode is negative
• The anode and cathode are both negative.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which electrode is inert electrode.

• Copper

• Iron

• Carbon

• Zinc

Positive ions (cations) will move towards the cathode (-) where they will discharge by....

• Breaking apart
• Losing electrons
• Clumping together.
• Gaining electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the equation to show what happens to chloride ions at the anode.

• Cl^- --> Cl + e-

• 2Cl^- --> Cl₂ + 2e-

• Cl₂ + 2e- 2Cl^-

• Cl₂ + 2e- _--> 2Cl^-

Tags

NGSS.HS-PS2-5

Choose the half-equation that shows the discharge of aluminium ion.

• Al³⁺ - 3e^- --> Al

• Al²⁺ + 3e^- --> Al

• Al³⁺ + 3e^- --> Al

• Al³⁺ --> Al + 3e^-

Tags

NGSS.HS-PS1-2

Why ionic compounds can not conduct electricity when they are solid?

• their electrons are not free to move

• their ions are free to move

• their ions are not free to move

• their electrons are free to move

In an aqueous solution of copper chloride, which ions are attracted to the negative electrode?

• Cu²⁺ and Cl^- and H⁺ and OH^-
• Cu²⁺ and H⁺ 
•  Cl^- and OH^-
• Cu²⁺ 

Tags

NGSS.HS-PS2-5

What change is observed at cathode during electrolysis of aqueous copper(II) chloride using carbon electrode

• Nothing

• pink solid deposit

• bubbles of green gas

• colourless gas

What are the ions present in molten Al₂O₃?

• Al²⁺ and O^3-

• Al^2- and O³⁺

• Al³⁺ and O^2-

• Al^3- and O²⁺

Oxidation is loss of electron. Where does oxidation take place during electrolysis.

• At anode

• In the solution

• At the circuit

• At cathode