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GCSE Chemistry (Edexcel) Quiz am Edexcel (9-1) Topic 5, erstellt von https:// revisechemistry.uk am 24/03/2018.

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Edexcel (9-1) Topic 5

Frage 1 von 15

1

Where are the transition metals found in the periodic table?

Wähle eine der folgenden:

  • On the left of the periodic table, in groups 1 and 2

  • In the middle of the periodic table, between groups 2 and 3

  • On the right of the periodic table, in groups 7 and 8

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Frage 2 von 15

1

What two things must be present for iron to rust?

Wähle eine oder mehr der folgenden:

  • oxygen

  • water

  • carbon dioxide

  • ethanol

  • calcium carbonate

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Frage 3 von 15

1

Why are alloys typically stiffer than pure metals?

Wähle eine der folgenden:

  • The metallic bonding is stronger in alloys

  • The metal atoms are all very regularly arranged in an alloy

  • The layers of metal atoms in the alloy cannot slide over each other very easily

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Frage 4 von 15

1

Fülle die Lücke, um den Text zu vervollständigen

A student had calculated the theoretical yield of a product was 8 g. The actual yield obtained was 6 g. What was the percentage yield?

%

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Frage 5 von 15

1

Which of the following could explain why the percentage yield in a chemical reaction was less than 100%?

Wähle eine der folgenden:

  • The top pan balance was faulty

  • The reaction forms more than one product

  • Some of the product was lost during pouring liquids

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Frage 6 von 15

1

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The 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?

%

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Frage 7 von 15

1

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A solution has a volume of 650 cm3. What is the volume of this solution in dm3?

dm3

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Frage 8 von 15

1

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A solution of NaOH has a concentration of 0.2 mol/dm3. Calculate its concentration in g/dm3. The RFM of NaOH is 40.

g/dm3

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Frage 9 von 15

1

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A 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?

moles

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Frage 10 von 15

1

Fülle die Lücken, um den Text zu vervollständigen.

What does NPK stand for in terms of fertilisers?
N -
P - phosphorous
K -

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Frage 11 von 15

1

Which of the following statements about dynamic equilibrium is true?

Wähle eine der folgenden:

  • The reaction has finished

  • The forwards and reverse reactions occur at the same rate

  • The concentration of reactants is the same as the concentration of products

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Frage 12 von 15

1

Which of these factors does not affect the choice of reaction pathway in an industrial chemical manufacturing process?

Wähle eine der folgenden:

  • The yield of product formed

  • The relative formula mass of the products

  • The uses for any by-products formed

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Frage 13 von 15

1

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What is the only chemical product when hydrogen and oxygen are reacted together in a fuel cell?

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Frage 14 von 15

1

Rusting is a specific example of corrosion, and requires both and water for iron to rust. There are three ways to prevent iron from rusting:
- exclusion of (by either using an atmosphere of or argon)
- exclusion of (by storing with a desiccant)
- sacrificial protection (when a more reactive than iron is attached to the object to prevent from rusting)

Klicke und ziehe, um den Text zu vervollständigen.

    air
    oxygen
    nitrogen
    water
    metal
    iron

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Frage 15 von 15

1

Fuel cells will produce a voltage continuously, provided they have a constant supply of fuel and oxygen (from the air).

Wähle eins der folgenden:

  • WAHR
  • FALSCH

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