Quiz
Edexcel (9-1) Topic 5
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Perguntas do quiz (15)
1Where are the transition metals found in the periodic table?
- AOn the left of the periodic table, in groups 1 and 2
- BIn the middle of the periodic table, between groups 2 and 3
- COn the right of the periodic table, in groups 7 and 8
2What two things must be present for iron to rust?
- Aoxygen
- Bwater
- Ccarbon dioxide
- Dethanol
- Ecalcium carbonate
3Why are alloys typically stiffer than pure metals?
- AThe metallic bonding is stronger in alloys
- BThe metal atoms are all very regularly arranged in an alloy
- CThe layers of metal atoms in the alloy cannot slide over each other very easily
4A student had calculated the theoretical yield of a product was 8 g. The actual yield obtained was 6 g. What was the percentage yield?
[blank_start]75[blank_end]%- A75
5Which of the following could explain why the percentage yield in a chemical reaction was less than 100%?
- AThe top pan balance was faulty
- BThe reaction forms more than one product
- CSome of the product was lost during pouring liquids
6The RFM of the desired product in a reaction is 95. The sum of the RFM values for the reactants is 113. What is the atom economy for this reaction?
[blank_start]84[blank_end]%- A84
7A solution has a volume of 650 cm3. What is the volume of this solution in dm3?
[blank_start]0.65[blank_end] dm3- A0.65
8A solution of NaOH has a concentration of 0.2 mol/dm3. Calculate its concentration in g/dm3. The RFM of NaOH is 40.
[blank_start]8[blank_end] g/dm3- A8
9A sample of methane gas has a volume of 120 cm3 at room temperature and pressure. The molar volume is 24 dm3. How many moles of methane are present in the sample?
[blank_start]5[blank_end] moles- A5
10What does NPK stand for in terms of fertilisers?
N - [blank_start]nitrogen[blank_end]
P - phosphorous
K - [blank_start]potassium[blank_end]- Anitrogen
- Bpotassium
11Which of the following statements about dynamic equilibrium is true?
- AThe reaction has finished
- BThe forwards and reverse reactions occur at the same rate
- CThe concentration of reactants is the same as the concentration of products
12Which of these factors does not affect the choice of reaction pathway in an industrial chemical manufacturing process?
- AThe yield of product formed
- BThe relative formula mass of the products
- CThe uses for any by-products formed
13What is the only chemical product when hydrogen and oxygen are reacted together in a fuel cell?
[blank_start]water[blank_end]- Awater
14Rusting is a specific example of corrosion, and requires both [blank_start]air[blank_end] and water for iron to rust. There are three ways to prevent iron from rusting:
- exclusion of [blank_start]oxygen[blank_end] (by either using an atmosphere of [blank_start]nitrogen[blank_end] or argon)
- exclusion of [blank_start]water[blank_end] (by storing with a desiccant)
- sacrificial protection (when a more reactive [blank_start]metal[blank_end] than iron is attached to the object to prevent [blank_start]iron[blank_end] from rusting)- Aair
- Boxygen
- Cnitrogen
- Dwater
- Emetal
- Firon
15Fuel cells will produce a voltage continuously, provided they have a constant supply of fuel and oxygen (from the air).
- AVerdadeiro
- BFalso
Informações
- Descrição
- GCSE Chemistry (Edexcel) Quiz sobre Edexcel (9-1) Topic 5, criado por https:// revisechemistry.uk em 24-03-2018.
- Idioma
- English
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