Testing for ions

Descripción

Unit 3
Daisy Fletcher-Cooney
Test por Daisy Fletcher-Cooney, actualizado hace más de 1 año
Daisy Fletcher-Cooney
Creado por Daisy Fletcher-Cooney hace casi 10 años
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Resumen del Recurso

Pregunta 1

Pregunta
What group are the alkali metals in?
Respuesta
  • Group 1
  • Group 7
  • Group 3
  • Group 4

Pregunta 2

Pregunta
What colour flame does lithium produce?
Respuesta
  • Orange
  • Yellow
  • Lilac
  • Red

Pregunta 3

Pregunta
Sodium produces an orange flame
Respuesta
  • True
  • False

Pregunta 4

Pregunta
What colour does potassium produce?
Respuesta
  • Blue
  • Lilac
  • Red
  • Yellow
  • Green

Pregunta 5

Pregunta
What colour flame does calcium produce?
Respuesta
  • Brick red
  • lilac
  • red
  • orange

Pregunta 6

Pregunta
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.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
When NaOH is added to Fe2+, what colour is the precipitate?
Respuesta
  • Orange-brown
  • green
  • blue

Pregunta 8

Pregunta
When NaOH is added to Fe3+, what colour is the precipitate?
Respuesta
  • Green
  • Orange-brown
  • Blue

Pregunta 9

Pregunta
When NaOH is added to Cu2+, the precipitate is green
Respuesta
  • True
  • False

Pregunta 10

Pregunta
When dilute NaOH is added to Zn2+, a white precipitate forms
Respuesta
  • True
  • False
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