AQA CHEMISTRY PAPER 2 - ORGANIC
CHEMISTRY EXAM QUESTIONS AND CORRECT
ANSWERS 100%
state the 3 different properties of hydrocarbons that change with size of the molecule -
ANS✔✔-viscosity , boiling point and flammability
how does increasing molecule size affect viscosity , boiling point , flammability -
ANS✔✔-increased boiling point
increased viscosity
decreased flammability
define crude oil - ANS✔✔-the remains of ancient organic matter found in rock
define cracking - ANS✔✔-process by breaking larger hydrocarbons into smaller , more
useful molecules
what does crude oil consist of? - ANS✔✔-A mixture of hydrocarbons
what is the general formula of alkanes - ANS✔✔-CnH2n+2
what are the first 4 alkanes - ANS✔✔-methane, ethane, propane, butane
what is purpose of fractional distilation - ANS✔✔-to seprerate hydrocarbons in crude oil
into fraction
state the word equation for complete combustion - ANS✔✔-hydrocarbon +oxygen ->
carbon dioxide +water +energy
identify the test for alkenes - ANS✔✔-alkenes react with bromine water theres a colour
change from orange to colourless
CHEMISTRY EXAM QUESTIONS AND CORRECT
ANSWERS 100%
state the 3 different properties of hydrocarbons that change with size of the molecule -
ANS✔✔-viscosity , boiling point and flammability
how does increasing molecule size affect viscosity , boiling point , flammability -
ANS✔✔-increased boiling point
increased viscosity
decreased flammability
define crude oil - ANS✔✔-the remains of ancient organic matter found in rock
define cracking - ANS✔✔-process by breaking larger hydrocarbons into smaller , more
useful molecules
what does crude oil consist of? - ANS✔✔-A mixture of hydrocarbons
what is the general formula of alkanes - ANS✔✔-CnH2n+2
what are the first 4 alkanes - ANS✔✔-methane, ethane, propane, butane
what is purpose of fractional distilation - ANS✔✔-to seprerate hydrocarbons in crude oil
into fraction
state the word equation for complete combustion - ANS✔✔-hydrocarbon +oxygen ->
carbon dioxide +water +energy
identify the test for alkenes - ANS✔✔-alkenes react with bromine water theres a colour
change from orange to colourless