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Chemical Test Questions with Solutions £10.91   Add to cart

Exam (elaborations)

Chemical Test Questions with Solutions

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  • Module
  • Semmelweis Entrance
  • Institution
  • Semmelweis Entrance

Exam of 2 pages for the course Semmelweis Entrance at Semmelweis Entrance (Chemical Test)

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  • August 8, 2024
  • 2
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Semmelweis Entrance
  • Semmelweis Entrance
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Chemical Test

Test for chlorine gas - answer Turns blue litmus paper red and bleaches
Acidic Gas

Test for ammonia gas - answer Turns damp red litmus paper blue
Alkaline Gas

Test for water - answer1) Boil if, if it boils at 100 degrees the substance is water

2)Add anhydrous copper (II)sulphate powder
Positive: Blue solution formed

3) Blue cobalt chloride paper turns pink

Test for lithium ions – answer Red Flame

Test for sodium ions - answer Flame test - yellow flame

Test for potassium ions - answer flame test - lilac flame

Test for calcium ions - answer Flame test brick red

Test for copper (II) ions (Flame) - answer Blue Green Flame

Test for copper (II) ions - answer Add sodium hydroxide

Positive: Pale blue precipitate

Test for iron (III) ions - answerAdd sodium hydroxide or ammonia solution

Positive: Red brown precipitate

Test for iron (II) - answerAdd sodium hydroxide or ammonia solution

Positive: Pale green precipitate

Test for ammonia - answerTurns damp red litmus paper blue

Test for carbonates - answerFirst add dilute hydrochloric acid
If carbonate ions (CO3 2-) are present carbon dioxide will be released and will turn
limewater cloudy

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