Sub-topic 1
2023 · National One-Eighth
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Definition of a binary compound (true/false)
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Sub-topic 2
2024 · National One-Eighth
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Distinguishing alloys from chemical compounds (true/false)
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Sub-topic 3
2025 · National One-Eighth
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Riddle: brass, an alloy of copper and zinc
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Sub-topic 4
2013 · National Preliminary
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Riddle: heavy water (d2o) as a triatomic binary compound
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Sub-topic 5
2013 · National Preliminary
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Definition of a deliquescent chemical
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Sub-topic 6
2013 · National Preliminary
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Definition of an efflorescent chemical
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Sub-topic 7
2013 · National Preliminary
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Sucrose is a deliquescent (not efflorescent) substance
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Sub-topic 8
2016 · National One-Eighth
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Steel as a solid solution alloy of two solids (true/false)
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Sub-topic 9
2017 · National Quarterfinal
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Lead(ii) hydroxide, being amphoteric, dissolves in excess naoh (true/false)
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