elle belle
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questions i got wrong in this past paper

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elle belle
Created by elle belle about 7 years ago
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Chemistry unit 1 hard q's (1)

Question 1 of 5

1

which of the following contains one mole of neutrons>?

Select one of the following:

  • 1g of H (1/1)

  • 1g of C (12/6)

  • 2g of Mg (24/12)

  • 2g of Ne (22/10)

Explanation

Question 2 of 5

1

Ammonia is manufactured from hydrogen and nitrogen in the Haber process.
3H₂(g) + N₂(g) → 2NH₃(g)
If 60 tonnes of hydrogen produces 80 tonnes of ammonia, what is the percentage
yield in the reaction?

Select one of the following:

  • 80/170 x 100%

  • 80/340 x 100%

  • 30/80 x 100%

  • 60/80 x 100%

Explanation

Question 3 of 5

1

What is the structure of Z-1,2-dibromoprop-1-ene?

Select one of the following:

  • Br CH3
    C=C
    H Br

  • H CH2Br
    C=C
    Br H

  • Br CH2Br
    C=C
    H H

  • H CH3
    C=C
    Br Br

Explanation

Question 4 of 5

1

Solutions of barium chloride and silver nitrate are mixed together. The reaction that takes place is an example of.........

Select one of the following:

  • Displacement

  • Neutralization

  • Oxidation

  • Precipitation

Explanation

Question 5 of 5

1

In an experiment carried out at 200oC and 1 atm pressure, 20 cm³of ammonia gas reacted with an excess of heated copper(II) oxide.
3CuO(s) + 2NH₃(g) → 3Cu(s) + 3H₂O(g) + N₂(g)
If all measurements were made at 200oC and 1 atm pressure, what would be the total volume, in cm³, of gaseous products?

Select one of the following:

  • 10

  • 20

  • 30

  • 40

Explanation

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