alkanes

Question 1

homologous series

Answer 1

same functional group with similar chemical properties and each successive number differs by CH2

Question 2

homolytic fission

Answer 2

bond is broken and one electron from the bond goes to each atom/ forms radicals

Question 3

alcohols/alkanes boiling point

Answer 3

alcohol have higher boiling point
they have hydrogen bonds which are stronger than van der waals’ forces in alkanes

Question 4

why is this mechanism likely to produce a mixture of organic products

Answer 4

substitution can replace any H atom

Question 5

danger of incomplete combustion

Answer 5

CO is toxic

Question 6

how does sigma bond form

Answer 6

overlap of orbitals directly between the bonding atoms

Question 7

shape and angle around c=c double bond

Answer 7

120 and trigonal planar

Question 8

why does catalyst reduce enery demand and benefit the environment

Answer 8

lower temps
less fossil fuels
reduces co2 emissions

Question 9

why does first ionisation energy show a generla increase across period 3

Answer 9

increased number of protons
increased nuclear charge
similar shielding
decreased atomic radius
greater nuclear attrction

Question 10

why does increase in ionisation energy across period 3 not shown by magneisum or aluminoum

Answer 10

al electron has higher energy
magnesium electron is removed from 3s but in al, electron is removed from 3p