Substitution reaction

The video tutorial explains substitution reactions, where one functional group in a molecule is replaced by another. It focuses on the reaction between methane and chlorine under ultraviolet light, resulting in the formation of chloromethane. Further substitution can lead to dichloromethane, which is used in decaffeinating coffee beans.

What type of reaction occurs when a functional group in a molecule is replaced by another?

• Redox reaction

• Elimination reaction

• Substitution reaction

• Addition reaction

What happens to a hydrogen atom in methane during a substitution reaction with chlorine?

• It is replaced by a chlorine atom

• It forms a double bond

• It is oxidized

• It is reduced

What is the name of the new substance formed when a hydrogen atom in methane is replaced by chlorine?

• Chloromethane

• Ethane

• Chloroform

• Methanol

What is the result of further substitution reactions involving methane and chlorine?

• Formation of dichloromethane

• Formation of hydrogen gas

• Formation of water

• Formation of carbon dioxide

What is one use of dichloromethane?

• To remove caffeine from green coffee beans

• As a food preservative

• As a fuel

• In the production of plastics