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GCSE stretch and challenge questions 2
By Phoenix Hoyle
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Question 1
1.
The volume of a sample of gas increases when the temperature is increased. The particles in a gas are far apart.
Question 2
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Question 3
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Question 4
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18
Question 5
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Question 6
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Question 10
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Question 13
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Question 15
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Question 16
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Question 17
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Question 18
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Question 19
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ZO
Question 20
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Question 21
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Question 22
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Question 23
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Question 24
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Question 25
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Question 26
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Question 27
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Question 28
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Question 29
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Question 30
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Question 31
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Question 32
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Question 33
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Question 34
34.
Question 35
35.
ammonia, NH_3
carbon monoxide, CO
1 and 3
1 only
2 and 3
The chemical properties of both ions are the same.
The number of electrons in each ion is different.
The number of neutrons in each ion is the same.
6.0\,g
8.0\,g
1
2
In an endothermic reaction, energy is used to break bonds but no energy is released when bonds form.
In an endothermic reaction, energy is released when bonds form but more energy is used to break bonds.
activation energy
backward reaction
sodium
rubidium
1, 2 and 3
1 and 2 only
19, 18
19, 35
42, 18
carbon monoxide, hydrogen, oxygen
methane, nitrogen monoxide, oxygen
A
B
C
C_{10}H_{22} \to 2C_{2}H_{4} + C_{3}H_{6} + C_{4}H_{10}
C_{10}H_{22} \to H_{2} + 2C_{2}H_{4} + C_{3}H_{6} + C_{5}H_{10}
C_{10}H_{22} \to 2C_{3}H_{6} + C_{4}H_{10}
Propene and bromine react to produce 1,3-dibromopropane.
But-2-ene and bromine react to produce 2,2-dibromobutane.
3
4
6
propan-1-ol, carboxylic acid
propan-1-ol, ester
butan-1-ol, carboxylic acid
2
4
a burette
a condenser
a measuring cylinder
apparatus to measure the volume of dilute hydrochloric acid: burette apparatus to measure the volume of aqueous sodium hydroxide: measuring cylinder
apparatus to measure the volume of dilute hydrochloric acid: burette apparatus to measure the volume of aqueous sodium hydroxide: volumetric pipette
apparatus to measure the volume of dilute hydrochloric acid: measuring cylinder apparatus to measure the volume of aqueous sodium hydroxide: burette
Measure the R_f values of the spots carefully.
Run the chromatogram for a longer time.
Run the chromatogram using a different solvent.
aluminium
ammonium