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AQA A LEVEL CHEMISTRY PAPER 2 UPDATED ACTUAL Questions and CORRECT Answers $9.99   Add to cart

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AQA A LEVEL CHEMISTRY PAPER 2 UPDATED ACTUAL Questions and CORRECT Answers

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AQA A LEVEL CHEMISTRY PAPER 2 UPDATED ACTUAL Questions and CORRECT Answers Relative atomic mass (Ar) - CORRECT ANSWER- Average mass of an atom compared with one twelth of the mass of an atom of carbon 12 Electronegativity - CORRECT ANSWER- Power of an atom to attract the pair of electrons ...

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  • October 15, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • AQA A LEVEL CHEMISTRY
  • AQA A LEVEL CHEMISTRY
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AQA A LEVEL CHEMISTRY PAPER 2
UPDATED ACTUAL Questions and
CORRECT Answers
Relative atomic mass (Ar) - CORRECT ANSWER✔✔- Average mass of an atom compared
with one twelth of the mass of an atom of carbon 12


Electronegativity - CORRECT ANSWER✔✔- Power of an atom to attract the pair of
electrons in a covalent bond


Standard enthalpy of combustion - CORRECT ANSWER✔✔- Enthalpy change when 1
mole of a substance burns completely in oxygen under standard conditions with all reactants
and products being in their standard state


Standard enthalpy of formation - CORRECT ANSWER✔✔- Enthalpy change when 1 mole
of a compound is formed from it's elements under standard conditions in their standard states


Mean bond enthalpy - CORRECT ANSWER✔✔- The average energy needed to break a
certain type of bond over a range of compounds


Activation energy - CORRECT ANSWER✔✔- Minimum energy required for colliding
molecules to react


Maxwell-Boltzmann distribution x and y axes - CORRECT ANSWER✔✔- x: Energy
y: fraction/number of molecules


What happens to the Maxwell-Boltzmann curve when temperature increases - CORRECT
ANSWER✔✔- Moves down and to the right



Rate of reaction - CORRECT ANSWER✔✔- Rate at which product formed/reactant used up

, Order of reaction - CORRECT ANSWER✔✔- Power to which the concentration of a species
is raised in the rate equation


rearrange k=Ae^-Ea/Rt - CORRECT ANSWER✔✔- lnk=-Ea/Rt+lnA



Conditions for thermal cracking - CORRECT ANSWER✔✔- High temperature and high
pressure


Products of thermal cracking - CORRECT ANSWER✔✔- High % of alkenes



Conditions for catalytic cracking - CORRECT ANSWER✔✔- High temperature ,slight
pressure and in the presence of a zeolite catalyst


Products of catalytic cracking - CORRECT ANSWER✔✔- Motor fuels and aromatic
hydrocarbons


Why do we crack alkanes? - CORRECT ANSWER✔✔- Smaller alkanes/alkenes generally
more useful than longer chain ones


Equation for complete combustion of alkanes - CORRECT ANSWER✔✔- alkane + oxygen
> carbon dioxide + water


Equations for incomplete combustion of alkanes - CORRECT ANSWER✔✔- alkane +
oxygen > carbon monoxide/carbon + water


Pollutants produced by combustion engines - CORRECT ANSWER✔✔- NOx, CO, C and
sunburned hydrocarbons


Reaction of methane with chlorine - CORRECT ANSWER✔✔- I: Cl2 > 2Cl•
P: CH4 + Cl• > CH3• + Chi
CH3• + Cl2 > CH3Cl + Cl•
T: CH3• + Cl• > CH3Cl

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