Electrolysis of Brine

Which one of the following metal is not extracted by electrolysis?

• Aluminium

• Iron

• Sodium

• Potassium

What is the name of the positive electrode?

• cathode
• anode

When NaCl solution is electrolysed what has forms at the anode?

• Hydrogen
• Oxygen
• Chlorine
• Sodium

In the electrolysis of brine what product do we get at the cathode?

• hydrogen gas

• oxygen gas

• sodium metal

• chlorine gas

Which are the useful products of electrolysis of brine?

• sodium hydroxide, chlorine and hydrogen

• sodium metal, oxygen and chlorine

• sodium metal, chlorine and sodium hydroxide

• sodium hydroxide, oxygen and hydrogen

Explain why the electrolyte has to be a liquid.

• So the ions can move
• So the electrons can move
• So that it doesn't get too hot
• So the fish are ok

What are the products for the electrolysis of brine?

• Na, NaOH, Cl₂

• H_2, NaOH, O₂

• H_2, Cl₂

• H_2, NaOH, Cl₂

Which are the useful products obtained from the of electrolysis of brine?

• sodium hydroxide, chlorine and hydrogen

• sodium metal, oxygen and chlorine

• sodium metal, chlorine and sodium hydroxide

• sodium hydroxide, oxygen and hydrogen

Give a use of hydrogen and of sodium hydroxide obtained from the electrolysis of brine.

• hydrogen as a fuel, sodium hydroxide to make explosives

• hydrogen as a solvent, sodium hydroxide as a fertilizer

• hydrogen as a fuel, sodium hydroxide to make soap

• hydrogen as a solvent, sodium hydroxide as a fertilizer

How can chlorine and hydrogen be tested?

• hydrogen and chlorine pop with a lighted splint

• hydrogen and chlorine bleach blue litmus paper

• hydrogen and chlorine both bleach blue litmus paper

• hydrogen pops with a lighted splint, chlorine bleaches blue litmus paper