Oxidation Reduction

The video tutorial explains the role of oxidation in extracting non-metals, focusing on chlorine extraction from brine through electrolysis. It details the chemical reactions involved, including the need for an external EMF. The tutorial also covers the extraction of gold and silver using cyanide leaching and subsequent recovery through displacement reactions with zinc.

Which process is commonly used for extracting chlorine from brine?

• Distillation

• Filtration

• Sublimation

• Electrolysis

What is the main product obtained from the electrolysis of brine?

• Chlorine gas

• Hydrogen gas

• Sodium metal

• Aqueous NaOH

What is the minimum external EMF required to drive the electrolysis of brine?

• 1.5 V

• 2.2 V

• 3.0 V

• 4.5 V

Which metal is used as a reducing agent in the recovery of gold from its cyanide complex?

• Copper

• Aluminum

• Zinc

• Iron

What type of reaction is involved in the leaching of noble metals with cyanide ions?

• Reduction

• Precipitation

• Neutralization

• Oxidation