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Chemical Test Questions with Solutions
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Exam of 2 pages for the course Semmelweis Entrance at Semmelweis Entrance (Chemical Test)
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Chemical TestTest 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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