AQA AS LEVEL MATHEMATICS 7356/2 PAPER 2
ELITE REVIEW STUDY GUIDE FULLY SOLVED
QUESTIONS AND DETAILED ANSWERS 2026
◉cyclohexane and cyclohexene (3) . Answer: reagent: bromine water (1)
observation: no reaction
observation: colourless
◉use these calculated Ar values to find the relative molecular mass (Mr)
of C6H6. give your answer to 4 decimal places (3) . Answer: 72.1416 -
70.1260 = 2.0156
2.0156/2 = 1.0078 (Ar of hydrogen)
70.1260 - (1.0078 x 12) = 12.0096 (Ar of carbon)
Mr= (6x1.0078) + (6x12.0096)
=78.1044 (Mr of C6H6)
◉this question is about fuels. crude oil is seperated into fractions by
fractional distillation. state the meaning of the term fraction in this
context (1) . Answer: mixture of compounds with similar boiling points
, ◉petrol for cars contains branched and cyclic alkanes produced by
catalytic cracking.
identify the catalyst used in this process (1) . Answer: zeolites
◉3-Ethyl-4-methylhexane is a branched alkane in petrol. draw the
skeltal formula for this alkane (1) . Answer: |
/\/\/
|
/
◉give the equation for the complete combustion of 3-ethyl-4-
methylhexane. use the molecular formula for the 3-ethyl-4-
methylhexane in your equation. (2) . Answer: C9H20 (1)
C9H20 + 14O2 ——> 9CO2 + 10H2O
◉CO2 is a product from the combustion of petrol in cars. CO2 acts as a
greenhouse gas when it absorbs infrared radiation. give 1 reason why
carbon dioxide absorbed infrared radiation (1) . Answer: because the
C=O bonds are polar
◉Nitrogen monoxide NO is formed when petrol is burned in cars. state
1 environmental problems that NO causes.
ELITE REVIEW STUDY GUIDE FULLY SOLVED
QUESTIONS AND DETAILED ANSWERS 2026
◉cyclohexane and cyclohexene (3) . Answer: reagent: bromine water (1)
observation: no reaction
observation: colourless
◉use these calculated Ar values to find the relative molecular mass (Mr)
of C6H6. give your answer to 4 decimal places (3) . Answer: 72.1416 -
70.1260 = 2.0156
2.0156/2 = 1.0078 (Ar of hydrogen)
70.1260 - (1.0078 x 12) = 12.0096 (Ar of carbon)
Mr= (6x1.0078) + (6x12.0096)
=78.1044 (Mr of C6H6)
◉this question is about fuels. crude oil is seperated into fractions by
fractional distillation. state the meaning of the term fraction in this
context (1) . Answer: mixture of compounds with similar boiling points
, ◉petrol for cars contains branched and cyclic alkanes produced by
catalytic cracking.
identify the catalyst used in this process (1) . Answer: zeolites
◉3-Ethyl-4-methylhexane is a branched alkane in petrol. draw the
skeltal formula for this alkane (1) . Answer: |
/\/\/
|
/
◉give the equation for the complete combustion of 3-ethyl-4-
methylhexane. use the molecular formula for the 3-ethyl-4-
methylhexane in your equation. (2) . Answer: C9H20 (1)
C9H20 + 14O2 ——> 9CO2 + 10H2O
◉CO2 is a product from the combustion of petrol in cars. CO2 acts as a
greenhouse gas when it absorbs infrared radiation. give 1 reason why
carbon dioxide absorbed infrared radiation (1) . Answer: because the
C=O bonds are polar
◉Nitrogen monoxide NO is formed when petrol is burned in cars. state
1 environmental problems that NO causes.
