O-LevelChemistryMetals & Reactivity5070/11 · May/June 2017 · Q241 Mark
The diagram shows part of the Periodic Table. Which row about the elements W, X and Y is correct? combines with oxygen in the ratio 2:3 exists as single atoms and is chemically unreactive forms a carbonate which is not decomposed by heating in a Bunsen flame A W X Y B W Y X C X W Y D X Y W
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AW combines with oxygen in the ratio 2:3, X exists as single atoms and is chemically unreactive, Y forms a carbonate which is not decomposed by heating in a Bunsen flame
BW combines with oxygen in the ratio 2:3, Y exists as single atoms and is chemically unreactive, X forms a carbonate which is not decomposed by heating in a Bunsen flame
CX combines with oxygen in the ratio 2:3, W exists as single atoms and is chemically unreactive, Y forms a carbonate which is not decomposed by heating in a Bunsen flame
DX combines with oxygen in the ratio 2:3, Y exists as single atoms and is chemically unreactive, W forms a carbonate which is not decomposed by heating in a Bunsen flame
✓ Correct answer
D: X combines with oxygen in the ratio 2:3, Y exists as single atoms and is chemically unreactive, W forms a carbonate which is not decomposed by heating in a Bunsen flame
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