WIM - Organic Reactions

Question 1

Name 2 homologous series whose functional groups contain C-O bonds?

Answer 1

Alcohols (-OH)
Ethers
Ester
Carboxylic Acid (-OH)

Question 2

Name the product and the type of reaction when a halogenoalkane reacts with an aqueous solution of sodium hydroxide

Answer 2

Alcohol

Nucleophilic Substitution

Question 3

Name the organic product in the reaction of ethene with bromine

Answer 3

Dibromoethane

Question 4

Give the reagents, conditions and product for the hydrogenation of an alkene

Answer 4

H₂ (g)
Nickel catalyst at 150⁰C with high pressure
(OR Platinum catalyst room temp and pressure)

Produces an alkane

Question 5

Give the conditions and product for the dehydration of an alcohol

Answer 5

Al₂O₃ at 400⁰C OR Reflux with H₂SO₄

Produces an alkene

Question 6

Give the products for the oxidation of a Primary alcohol when:

i) distilled
ii) under reflux

Answer 6

i) An aldehyde and water

ii) A Carboxylic acid and water

Question 7

Give the products for the oxidation of a secondary alcohol

Answer 7

A Ketone

Question 8

Give the products for the oxidation of a tertiary alcohol

Answer 8

Tertiary alcohols can’t be oxidised

Question 9

Give the conditions and reagents for the oxidation of an alcohol

Answer 9

Acidified Potassium dichromate (K₂Cr₂O₇) either distilled or under reflux

Question 10

Give the reagents, conditions and products for the halogenation of tertiary alcohols

Answer 10

Hydrogen Halide (HX) shaken at room temperature to produce a halogen alkane

Question 11

Give the conditions, reagents and products for the dehalogenation of a halogen alkane by nucleophilic substitution

Answer 11

Reflux with aqueous Sodium Hydroxide

To produce an Alcohol

Question 12

What product is formed when an alkene reacts with Br₂ at 20°C and by which mechanism?

Answer 12

A Dibromoalkane

Electrophilic addition

Question 13

What product is formed when an alkene reacts with HBr at 20°C and by which mechanism?

Answer 13

A Bromoalkane

Electrophilic addition

Question 14

What reagents and conditions must be used to form an amine form a chloroalkane?

Answer 14

Reflux with excess NH₃ in ethanol solvent

Question 15

Give the conditions required for the free radical polymerisation of an alkene and give the product

Answer 15

200°C
2000atm
A small amount of O₂ as an impurity
Produces a poly(alkane)

Question 16

Give the 3 stages of free radical polymerisation and for each, state whether there are more radicals before, after or equal both sides of the reaction

Answer 16

1) Initiation - More before
2) Propagation - Equal both sides
3) Termination - More after