Daisy Fletcher-Cooney
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Unit 3

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Daisy Fletcher-Cooney
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Testing for ions

Question 1 of 10

1

What group are the alkali metals in?

Select one of the following:

  • Group 1

  • Group 7

  • Group 3

  • Group 4

Explanation

Question 2 of 10

1

What colour flame does lithium produce?

Select one or more of the following:

  • Orange

  • Yellow

  • Lilac

  • Red

Explanation

Question 3 of 10

1

Sodium produces an orange flame

Select one of the following:

  • True
  • False

Explanation

Question 4 of 10

1

What colour does potassium produce?

Select one of the following:

  • Blue

  • Lilac

  • Red

  • Yellow

  • Green

Explanation

Question 5 of 10

1

What colour flame does calcium produce?

Select one or more of the following:

  • Brick red

  • lilac

  • red

  • orange

Explanation

Question 6 of 10

1

Ammonium ions can be identified in a solution by adding dilute sodium hydroxide solution and gently heating. If ammonium ions are present, they will be converted to ammonia gas. Ammonia has a characteristic choking smell. It also turns damp red litmus paper or damp universal indicator paper blue.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 10

1

When NaOH is added to Fe2+, what colour is the precipitate?

Select one of the following:

  • Orange-brown

  • green

  • blue

Explanation

Question 8 of 10

1

When NaOH is added to Fe3+, what colour is the precipitate?

Select one of the following:

  • Green

  • Orange-brown

  • Blue

Explanation

Question 9 of 10

1

When NaOH is added to Cu2+, the precipitate is green

Select one of the following:

  • True
  • False

Explanation

Question 10 of 10

1

When dilute NaOH is added to Zn2+, a white precipitate forms

Select one of the following:

  • True
  • False

Explanation

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