AS AQA CHEMISTRY PAPER 2 2018 ALL QUESTIONS AND CORRECT ANSWERS WITH EXPLANATION (100% GUARANTEE PASS).

AS AQA CHEMISTRY PAPER 2 2018 ALL
QUESTIONS AND CORRECT ANSWERS
WITH EXPLANATION (100% GUARANTEE
PASS).

How many structural isomers with an unbranched carbon chain have the
molecular formula C4H8Br2?
A4
B5
C6
D 7 - CorreCt Answers -C


Ethanol can be made from glucose by fermentation.
C6H12O6 → 2C2H5OH + 2CO2
In an experiment, 268 g of ethanol (Mr = 46.0) were made from 1.44 kg of
glucose (Mr = 180.0).


What is the percentage yield?
A 18.6%
B 36.4%
C 51.1%
D 72.8% - CorreCt Answers -B


Which species could act as a nucleophile?
A BH3

, B NH4 +
C PH3
D SiH4 - CorreCt Answers -C


Which statement is correct about poly(chloroethene)?
A It has the empirical formula CHCl
B It decolourises bromine water.
C Its brittleness is reduced by plasticisers.
DIts polymer chain contains alternate single and double bonds. - CorreCt
Answers -C



A gas cylinder contains 5.0 kg of propane.
How many propane molecules are in the cylinder?
The Avogadro constant, L = 6.022 × 1023 mol-1
A 6.8 × 1022
B 7.2 × 1022
C 6.8 × 1025
D 7.2 × 1025 - CorreCt Answers -C


Which sample of liquid has the greatest volume?
A 500 mg of pentane (density = 0.63 g cm-3)
B 650 mg of propan-1-ol (density = 0.80 g cm-3)
C 1.20 g of dichloromethane (density = 1.33 g cm-3)