Chemical properties of alkanes : Reaction with halogens ( substitution reaction )

What is a substitution reaction?

• A reaction in which one molecule breaks into two smaller molecules

• A reaction in which one reactant is substituted for another

• A reaction in which one part of a molecule is swapped with a part of another molecule

• A reaction in which the atoms in a molecule rearrange to form a different molecule with the same molecular formula

• A reaction in which two molecules combine to form a larger molecule, with no by-products

Alkanes react with halogens in the presence of ultraviolet rays by.................

• elimination

• condensation

• substitution

• reduction

Which catalyst is used for the halogen substitution reactions of alkanes?

• X-rays

• Infrared radiation

• Concentrated acid

• Ultraviolet light

• Fine nickel mesh

What is the name given to a reaction where a part of a molecule is removed and replaced with something else?

• An elimination reaction

• An addition reaction

• A substitution reaction

• A polymerization reaction

• A condensation reaction

Through the equation:

   What is the type of this reaction?

• Hydration

• Neutralization

• Addition

• Substitution

Through the equation :

What is the type of this reaction ? …..

• Hydration

• Neutralization

• Addition

• ٍSubstitution

All the following are addition reactions except

• a

• b

• c

• d

Which of the following general word equations correctly describes the substitution reaction of an alkane?

• Alkane + halogen → dihaloalkane

• Alkane → alkene + alkane

• Alkane + oxygen → carbon dioxide + water

• Alkane + halogen → haloalkane + hydrogen halide

• Alkane + hydrogen halide → haloalkane + water

Fill in the blank: A substitution reaction involves

• two reactants and one product

• two reactants and multiple products

• multiple reactants and multiple products

• one reactant and two products

• two reactants and two products

Which of the following molecules can react with chlorine by a substitution reaction?

• C₂H₂

• C₃H₆

• C₂H₄

• C₃H₈