Reactions of Alkanes

What is the condition needed for substitution reaction with chlorine?

• presence of sunlight

• presence of red light

• presence of UV light

• all of the above

What type of chemical reaction is this:

C₃H₈ + Br₂ ⟶ C₃H₇CBr + HBr

• Incomplete combustion

• Hydrogenation

• Complete combustion

• Free radical substitution

Which of the following is true about incomplete combustion?

• It takes place because there is too much fuel

• It takes place because there is not enough supply of air

• The products are soot and hydrocarbons

• The products are hydrogen and water

Give the name of reaction, when alkanes react with bromine in the presence of UV.

• Hydrogenation

• Halogenation

• Hydration

• Hydrohalogenation

What happened if alkane reacts with limited oxygen?

• Produced carbon dioxide and water

• Produced carbon monoxide and water

• Produced oxygen and water

• Produced soot and water

What is the name of this step?

• Termination Step

• Propagation Step

• Initiation Step

• Cleavage Step

Which of the following shows a propagation step?

• 
• 
• 
• 

What is the type of cleavage that occurs in the initiation step when a halogen is exposed to UV light?

• Heterolytic fission

• Hoholytic fission

• Homoterolytic fission

• Homolytic fission

Which equation represents a termination step?

• 
• 
• 
• 

Which equation is a propagation step in the conversion of chloromethane into dichloromethane by reaction with chlorine in the presence of ultraviolet light?

• CHCl₃ + Cl₂ ⟶ CCl₄ + HCl

• ●CH₂Cl + ●Cl ⟶ CH₂Cl₂

• CH₃Cl + ●Cl ⟶ CH₂Cl₂ + ●H

• ●CH₂Cl + Cl₂ ⟶ CH₂Cl₂ + ●Cl