Halogenoalkanes

Question 1

What are halogenoalkanes

Answer 1

Alkenes in which one or more hydrogen atoms have been replaced by a halogen atom

Question 2

Is a carbon-halogen covalent bond polar?

Answer 2

Yes

Question 3

Are symmetrical molecules (CX4) polar

Answer 3

No

Question 4

What reactions do halogenoalkanes undergo?

Answer 4

NUCLEOPHILIC substitution and elimination

Question 5

What happens in a NUCLEOPHILIC substitution reaction ?

Answer 5

Another atom or group of atoms is substituted for the halogen atom

Question 6

What happens in an elimination reaction

Answer 6

One hydrogen atom and one halogen atom are removed and an alkene is formed

Question 7

What is a nucleophile

Answer 7

It has a lone pair of electrons and carries a negative charge (whole in an anion of partial in a polar molecule)

Question 8

What are nucleophiles attracted to

Answer 8

The slightly positive charge carbon in the carbon-halogen bond

Question 9

Give 3 examples of a nucleophile

Answer 9

OH-
NH3
CN-

Question 10

In what conditions do halogenoalkanes undergo elimination reactions with OH- ions

Answer 10

Ethanol