Organic 6 wrong answers

Question 1

when is an alkene an E isomer

Answer 1

when the two high priority groups attached are on the same side of the carbon double bond

Question 2

ethene reacts with chlorine to produce?
give the structural formula

Answer 2

ClH2CH2Cl

Question 3

what family is formed when ethene reacts with aqueous potassium manganate

Answer 3

alcohol

Question 4

state why the empirical formula of a poly(alkane) is the same as that of the monomer from which it is produced

Answer 4

they have the same C:H ratio in their simplest forms

Question 5

what the atom economy for the production of a poly(alkene) from an alkene and why?

Answer 5

100% because there are no waste products formed in addition polymerisation

Question 6

what are three problems as a result of incomplete combustion

Answer 6

-production of carbon monoxide which is poisonous/toxic gas
-unburned hydrocarbons react together to form compounds which are toxic
-Carbon particulate are released into the atmosphere

Question 7

main problem from complete combustion of alkane fuels

Answer 7

carbon dioxide is a greenhouse gas, that traps heat from the earth, reradiating it to the earth and damage the ozone

Question 8

what does a single headed curly arrow mean

Answer 8

denotes 1 electron pair is moving

Question 9

what does a double headed curly arrow mean

Answer 9

denotes a lone electron pair

Question 10

suggest why a small amount of UV light can result in the formation of a large amount of product (use chlorine)

Answer 10

chlorine radical is regenerated by the propagation each time a molecule of product is formed

Question 11

scientists never detect molecular hydrogen H2 amongst the products of the chlorination of methane
suggest why?

Answer 11

UV light does not have enough energy to break C-H bonds
so no H free radicals, therefore they could not combine to make H2

Question 12

what is the role of OH ions in nucleophilic substitution

Answer 12

nucleophile

Question 13

what is the classification of the mechanisim between ethene and bromine

Answer 13

electrophilic addition

Question 14

what is formed during heterolytic fission of a sigma bond in an alkane

Answer 14

ions

Question 15

what is the formula for non-cyclical saturated hydrocarbons

Answer 15

CnH2n+2

Question 16

equation for cycloalkanes

Answer 16

CnH2n

Question 17

equation for cyclicalkenes

Answer 17

CnH2n-2

Question 18

what makes a good nucleophile

Answer 18

lone pairs

Question 19

what is reforming

Answer 19

process in the petroleum industry that converts straight-chain alkanes into branched alkanes and aromatic hydrocarbons, primarily to improve gasoline quality