Alkane Halogenation

What is the general equation for the halogenation of alkanes?

• alkane + halogen -> haloalkane + hydrogen halide

• alkane + halogen -> haloalkane + water

• alkane + halogen -> alkene + hydrogen halide

• alkane + halogen -> haloalkane + oxygen

Which halogens are commonly used in the halogenation of alkanes?

• Bromine and iodine

• Chlorine and bromine

• Chlorine and fluorine

• Fluorine and iodine

What is the role of UV light in the free radical halogenation reaction?

• UV light initiates the formation of free radicals in the halogen molecule.

• UV light inhibits the formation of free radicals in the halogen molecule.

• UV light accelerates the reaction without involving free radicals.

• UV light has no impact on the halogenation reaction.

What is the initiation step in the free radical halogenation of alkanes?

• Formation of a radical cation

• Homolytic cleavage of a halogen molecule (X2) to form two halogen radicals (2X•)

• Formation of a carbocation intermediate

• Addition of a halogen molecule (X2) to the alkane

What is the propagation step in the free radical halogenation of alkanes?

• Reaction of an alkyl radical with a halogen molecule to form a new alkane molecule.

• Reaction of a halogen radical with an alkane molecule to form an alkyl radical and a new halogen radical.

• Conversion of an alkane molecule into a halogen radical.

• Formation of a halogen molecule from an alkyl radical.

What is the termination step in the free radical halogenation of alkanes?

• Formation of a radical species

• Addition of a halogen atom

• Decomposition of a radical species

• Combination of two radical species

What is the major product when methane undergoes halogenation with chlorine?

• Chloroform (CHCl3)

• Chloroethane (C2H5Cl)

• Dichloromethane (CH2Cl2)

• Chloromethane (CH3Cl)

How does the reactivity of halogens in alkane halogenation change down the group in the periodic table?

• Reactivity decreases down the group

• Reactivity increases down the group

• Reactivity remains constant down the group

• Reactivity is not affected by the group

What are some potential environmental concerns associated with alkane halogenation reactions?

• Increased efficiency in waste management

• Potential environmental concerns associated with alkane halogenation reactions include the production of toxic byproducts and the use of harmful halogenating agents.

• Reduced carbon footprint

• Enhanced biodiversity in the affected area