November Mocks

Question 1

give the crude oil fractions in order

Answer 1

refinery gases
gasoline
kerosene
diesel
fuel oil
bitumen

Question 2

catalyst and tempurature for cracking reaction

Answer 2

aluminum oxide
650 c

Question 3

why are cracking reactions important

Answer 3

creates more useful shorter alkanes
creates alkanes for use in polymers

Question 4

hydrocarbon definition

Answer 4

a compound containing only hydrogen and carbon

Question 5

incomplete combusion products

Answer 5

water
carbon monoxide

Question 6

general formula for aklanes

Answer 6

CnH2n+2 (2 and n’s are small)

Question 7

unsaturated definition

Answer 7

contains a double carbon bond

Question 8

hydrocarbon unsaturated test

Answer 8

bromine water orange to colourless

Question 9

alkane

Answer 9

a saturated hydrocarbon

Question 10

homologous series

Answer 10

a group of compounds with the same functional group, showing a trend in physical properties

Question 11

why are long chain hydrocarbons cracked

Answer 11

they are more useful in short chain form
long chains are in low demand

Question 12

hydrocarbon reaction name

Answer 12

addition

Question 13

isomer definition

Answer 13

compounds with the same molecular formula but different structural formulas

Question 14

polymer definition

Answer 14

a long chain molecule
formed from repeating units

Question 15

molecular formula

Answer 15

the number and type of atoms in a molecule

Question 16

empirical formula

Answer 16

simplest whole number ratio of element in a molecule

Question 17

test for water

Answer 17

anhydrous copper(2) sulpphate turns from white to blue

Question 18

ionic bonding

Answer 18

the strong electrostatic attraction between oppositely charged ions

Question 19

what kinda structure do ionic compounds contain

Answer 19

giant ionic lattice

Question 20

concentration=

Answer 20

concentration=moles/volume(dm3)

Question 21

moles1=

Answer 21

moles1=mass/rfm

Question 22

moles2=

Answer 22

moles2=volume(dm3)/24

Question 23

Diamond- structure and breaking
notes- same as Silicon Dioxide

Answer 23

Structure:
Tetrahedral
Grid-like arrangement
Breaking:
Strong Covalent bonds
Lots of bonds in the lattice
Lots of energy is required to break all the bonds

Question 24

Graphite- structure and bonding

Answer 24

Structure:
Layers of carbon atoms
Weak IMF’s between layers
Delocalised electrons
Breaking:
Strong Covalent bonds
Lots of bonds in the lattice
Lots of energy is required to break all the bonds

Question 25

collision theory tempurature

Answer 25

particles have more kinetic energy the percentage of collisions with energy above activation energy is higher more successful collisions per unit time

Question 26

collision theory catalysts

Answer 26

provide an alternate route with lower activation energy the percentage of collisions with energy above activation energy is higher so there are more successful collision per unit time

Question 27

collision theory- surface area

Answer 27

more solid is exposed to other particles so collision frequency is higher so there are more collisions per unit time

Question 28

collision theory- concentration

Answer 28

there are more particles per unit volume so the collision frequency is higher so there are more successful collision per unit time

Question 29

chromatography practical steps (4)

Answer 29

draw a start line in pencil place samples on the start line place the paper in the beaker with the start line above the solvent stop the experiment when the food colouring (spots) stop moving

Question 30

What are the problems with impurities in crude oil

Answer 30

Sulphur dioxide is produced It dissolves into rainwater Which forms acid rain

Question 31

What to do if you are asked to give the "polymerisation equation"

Answer 31

turn the double C bond into a single C bond

Question 32

enthalpy change =

Answer 32

energy (kj)/ moles

Question 33

draw the repeating unit?

Answer 33

take the double bond and draw brackets around the unit with a small "n"

Question 34

polyethene use

Answer 34

shopping bag

Question 35

polypropene use

Answer 35

climbing ropes

Question 36

polychloroethene use

Answer 36

wire insulation

Question 37

polytetrafloroethene use

Answer 37

non stick coating

Question 38

how to conduct a flame test

Answer 38

dip nichrome wire into hcl to clean it of any acid dip it into the solution you are testing put into a non luminous bunsen flame

Question 39

all flame test results

Answer 39

Red Flame - Li+ Yellow Flame - Na- Lilac flame - K+ Orange flame- Ca2+ Blue-Green - Cu2+

Question 40

ammonium test

Answer 40

add sodium hydroxide red litmus paper turns blue

Question 41

Methane n number for general formula

Answer 41

1

Question 42

Ethane n number for general formula

Answer 42

2

Question 43

Propane n number for general formula

Answer 43

3

Question 44

Butane n number for general formula

Answer 44

4

Question 45

Gas moles eq

Answer 45

gas volume/ molar volume