AQA A LEVEL CHEMISTRY QUESTIONS AND LATEST
CORRECT ANSWERS
Relative,atomic,mass,,,ANS,-
The,average,mass,of,an,atom,of,an,element,,relative,to,1/12th,of,the,mass,of,an,atom,of,Carbon-12
Relative,molecular,mass,,,ANS,-Average,mass,of,a,molecule,compared,to,1/12th,of,the,mass,of,a,carbon-
12,atom
The,Avogradro,constant,,,ANS,-the,number,of,particles,in,a,mole
ideal,gas,equation,,,ANS,-pV,=,nRT
empirical,formula,,,ANS,-the,simplest,whole,number,ratio,of,atoms,of,each,element,in,a,compound
percentage,atom,economy,,,ANS,-(Mass,of,desired,product/total,mass,of,reactants),x,100
ionic,bonding,,,ANS,-the,electrostatic,attraction,between,oppositely,charged,ions,in,a,lattice
covalent,bond,,,ANS,-a,shared,pair,of,electrons,between,non-metal,elements
co-ordinate,bond,,,ANS,-a,shared,pair,of,electrons,where,both,electrons,are,supplied,by,one,atom
repulsion,in,shapes,of,molecules,,,ANS,-Lone,pair-lone,pair,>,lone,pair-bonding,pair,>,bonding,pair-
bonding,pair
electronegativity,,,ANS,-the,power,of,an,atom,to,attract,the,pair,of,electrons,in,a,covalent,bond
hess',law,,,ANS,-Total,enthalpy,change,for,a,reaction,is,independent,of,the,route,chosen
, mean,bond,enthalpy,,,ANS,-
The,energy,required,to,break,a,covalent,bond,into,gaseous,atoms,averaged,over,different,molecules
Bonds,broken,-,bonds,made
activation,energy,,,ANS,-The,minimum,amount,of,energy,needed,to,start,a,chemical,reaction
catalyst,,,ANS,-
A,substance,that,increases,the,rate,of,a,chemical,reaction,without,being,changed,by,providing,an,alternati
ve,reaction,pathway,by,lowering,activation,energy
Le,Chatelier's,principle,,,ANS,-
When,a,system,in,dynamic,equilibrium,is,subjected,to,change,,the,position,of,equilibrium,will,shift,to,opp
ose,the,change.
oxidising,agents,,,ANS,-electron,acceptors
reducing,agents,,,ANS,-electron,donors
Enthalpy,of,formation,,,ANS,-
Enthalpy,change,when,one,mole,of,a,compound,is,formed,from,its,constituent,elements,under,standard,c
onditions,in,their,standard,states
Enthalpy,of,atomization,,,ANS,-
The,energy,required,to,produce,one,mole,of,gaseous,atoms,from,an,element,in,its,standard,state
Electron,affinity,,,ANS,-the,enthaply,change,when,one,mole,of,gaseous,atoms,forms,one,mole,of,-1,ions
Lattice,enthalpy,of,formation,,,ANS,-
Enthalpy,change,when,one,mole,of,a,solid,ionic,compound,is,formed,from,its,constituent,ions,in,the,gas,p
hase
CORRECT ANSWERS
Relative,atomic,mass,,,ANS,-
The,average,mass,of,an,atom,of,an,element,,relative,to,1/12th,of,the,mass,of,an,atom,of,Carbon-12
Relative,molecular,mass,,,ANS,-Average,mass,of,a,molecule,compared,to,1/12th,of,the,mass,of,a,carbon-
12,atom
The,Avogradro,constant,,,ANS,-the,number,of,particles,in,a,mole
ideal,gas,equation,,,ANS,-pV,=,nRT
empirical,formula,,,ANS,-the,simplest,whole,number,ratio,of,atoms,of,each,element,in,a,compound
percentage,atom,economy,,,ANS,-(Mass,of,desired,product/total,mass,of,reactants),x,100
ionic,bonding,,,ANS,-the,electrostatic,attraction,between,oppositely,charged,ions,in,a,lattice
covalent,bond,,,ANS,-a,shared,pair,of,electrons,between,non-metal,elements
co-ordinate,bond,,,ANS,-a,shared,pair,of,electrons,where,both,electrons,are,supplied,by,one,atom
repulsion,in,shapes,of,molecules,,,ANS,-Lone,pair-lone,pair,>,lone,pair-bonding,pair,>,bonding,pair-
bonding,pair
electronegativity,,,ANS,-the,power,of,an,atom,to,attract,the,pair,of,electrons,in,a,covalent,bond
hess',law,,,ANS,-Total,enthalpy,change,for,a,reaction,is,independent,of,the,route,chosen
, mean,bond,enthalpy,,,ANS,-
The,energy,required,to,break,a,covalent,bond,into,gaseous,atoms,averaged,over,different,molecules
Bonds,broken,-,bonds,made
activation,energy,,,ANS,-The,minimum,amount,of,energy,needed,to,start,a,chemical,reaction
catalyst,,,ANS,-
A,substance,that,increases,the,rate,of,a,chemical,reaction,without,being,changed,by,providing,an,alternati
ve,reaction,pathway,by,lowering,activation,energy
Le,Chatelier's,principle,,,ANS,-
When,a,system,in,dynamic,equilibrium,is,subjected,to,change,,the,position,of,equilibrium,will,shift,to,opp
ose,the,change.
oxidising,agents,,,ANS,-electron,acceptors
reducing,agents,,,ANS,-electron,donors
Enthalpy,of,formation,,,ANS,-
Enthalpy,change,when,one,mole,of,a,compound,is,formed,from,its,constituent,elements,under,standard,c
onditions,in,their,standard,states
Enthalpy,of,atomization,,,ANS,-
The,energy,required,to,produce,one,mole,of,gaseous,atoms,from,an,element,in,its,standard,state
Electron,affinity,,,ANS,-the,enthaply,change,when,one,mole,of,gaseous,atoms,forms,one,mole,of,-1,ions
Lattice,enthalpy,of,formation,,,ANS,-
Enthalpy,change,when,one,mole,of,a,solid,ionic,compound,is,formed,from,its,constituent,ions,in,the,gas,p
hase
