C6.2 - Organic chem

Question 1

why do longer hydrocarbons have stronger IM forces

Answer 1

there are more points of contact so more energy is required

Question 2

what is special about a homologous series

Answer 2

they have the same:
Functional group
General Formula

Question 3

What is the general formula for alkanes

Answer 3

C(n) H(2n+2)

Question 4

What is the general formula for alkenes

Answer 4

C(n) H(2n)

Question 5

What is the functional group for alkenes

Answer 5

C=C

Question 6

Are alkenes saturated or unsaturated?

Answer 6

unsaturated

Question 7

are alkanes saturated or unsaturated

Answer 7

Saturated

Question 8

What is a test for alkenes

Answer 8

Add bromine water, if an alkene is present the bromine water will go from orange-brown to colourless

Question 9

What is the functional group of alcohols

Answer 9

OH

Question 10

What is the functional group of carboxylic acids?

Answer 10

COOH

Question 11

Describe a test for carboxylic acids

Answer 11

add Anhydrous sodium carbonate. If a carboxylic acid is present it will go from colourless to white and will fizz.

Question 12

what two products are made in complete combustion?

Answer 12

CO2 and H2O

Question 13

What 2 products are made in incomplete combustion

Answer 13

CO and H2O

Question 14

Name the fractions in the fractional distillation of crude oil (HINT - GPNKDLFB)

Answer 14

Gas
Petrol
Naphtha
Kerosene
Diesel
Lubricant oil
fuel oil
bitumen

Question 15

what is cracking?

Answer 15

Splitting long useless alkane molecules into smaller alkane and alkene molecules which are more useful

Question 16

What is a condensation reaction and what does it make?

Answer 16

Two molecules (carboxylic acid and alcohol) react together to make one large and one small product (water) POLYESTER

Question 17

How is a polyamide made?

Answer 17

Carboxylic acid + amide group