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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-OC-WA-0011 markL1 FoundationCalculatorTesting water
Anhydrous copper(II) sulfate turns blue with water. Its original colour is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0021 markL1 FoundationCalculatorTesting water
Anhydrous cobalt(II) chloride turns
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0041 markL1 FoundationCalculatorWater treatment
Chlorine is added to drinking water to
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0121 markL1 FoundationCalculatorTesting water
Pure water boils at
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0031 markL2 StandardCalculatorTesting water
Which is a test for PURE water?
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0051 markL2 StandardCalculatorWater treatment
Filtration in water treatment removes
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0061 markL2 StandardCalculatorWater treatment
Nitrates from fertilisers in rivers can cause
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0071 markL2 StandardCalculatorWater treatment
Which is beneficial in natural water?
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0081 markL2 StandardCalculatorTesting water
Distilled water, not tap water, is used in experiments because
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0091 markL2 StandardCalculatorWater treatment
The correct order of water treatment is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0101 markL2 StandardCalculatorTesting water
A sample of water melts at −2 ∘C-2\,^\circ\mathrm{C}. This shows it
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-WA-0111 markL3 ExamCalculatorWater treatment
Activated carbon is used in some water treatment to
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Salam Academy Original Practice · Proposed mark scheme