AQA CHEMISTRY AS LEVEL PAPER 1 EXAM
QUESTIONS AND VERIFIED ANSWERS
(LATEST UPDATE 2026) UPDATE
Acid - correct answer - Donates H+
Atom Economy Formula - correct answer - Mr of Desired
Product / Mr of All Products x 100
Water atoms
Base - correct answer - Accepts H+
Calculating Enthalpy Change - correct answer -
Reactants - Products
Or
KJ^-1mol
Q=MCAT
Divided by moles
Catalyst - correct answer - Increase rate of attainment
of equilibrium
, Doesn't affect position
Drop at 2,3 - correct answer - Al - Between groups 2,3...
first electron in p orbital
- increase in shielding
- reduce forces of attraction
- less energy required to remove
Drop at 4,5 - correct answer - P - between groups 4-5
there is a drop
- First electron pairing
- increased repulsion
- less energy is required to remove an eleccte
Dynamic Equilibrium - correct answer - The rate of
forward reaction is equal to the backward reaction in a
closed system
Electron Impact - correct answer - High KE electrons
bombard
Knock off electrons
1+ ions
QUESTIONS AND VERIFIED ANSWERS
(LATEST UPDATE 2026) UPDATE
Acid - correct answer - Donates H+
Atom Economy Formula - correct answer - Mr of Desired
Product / Mr of All Products x 100
Water atoms
Base - correct answer - Accepts H+
Calculating Enthalpy Change - correct answer -
Reactants - Products
Or
KJ^-1mol
Q=MCAT
Divided by moles
Catalyst - correct answer - Increase rate of attainment
of equilibrium
, Doesn't affect position
Drop at 2,3 - correct answer - Al - Between groups 2,3...
first electron in p orbital
- increase in shielding
- reduce forces of attraction
- less energy required to remove
Drop at 4,5 - correct answer - P - between groups 4-5
there is a drop
- First electron pairing
- increased repulsion
- less energy is required to remove an eleccte
Dynamic Equilibrium - correct answer - The rate of
forward reaction is equal to the backward reaction in a
closed system
Electron Impact - correct answer - High KE electrons
bombard
Knock off electrons
1+ ions
