mock paper 2

Question 1

test for co2

Answer 1

limewater test, should go cloudy

Question 2

q2

Answer 2

c3 h6

Question 3

test for hydrogen

Answer 3

squeaky pop test, insert lighted splint into the gas and should make a pop noise

Question 4

test for alkenes

Answer 4

bromine water, turns from brown to colourless

Question 5

agriculture water waste=

industrial water waste = chemicals

Question 6

How is sewage sludge treated before being released into the environment?

Answer 6

anaerobic digestion

Question 7

problem oxides of nitrate cause

Answer 7

acid rain

Question 8

mass of dissolved solids

Answer 8

dependent

Question 9

how is crude oil formed

Answer 9

dead plankton remains over time buried in mud

Question 10

fractional distillation

Answer 10

crude oil is heated
gas is vaporises and condenses
fractions collect the crude oil at different boiling points with the top fractions having the lowest boiling point and viscosity and the lowest have the highest boiling point and viscosity

Question 11

formula for alkanes

Answer 11

CnH2n+2

Question 12

trend in boiling points of alkanes

Answer 12

the number of alkanes increases with the number of carbon atoms because of weak intermolecular forces