O-LevelChemistryAtomic Structure5070/11 · Oct/Nov 2013 · Q191 Mark

Sulfur and selenium, Se, are in the same group of the Periodic Table. From this, we would expect selenium to form compounds having the formulae

ASe2O, Na2Se and NaSeO4.

BSeO2, Na2Se and NaSeO4.

CSeO2, Na2Se and Na2SeO4.

DSeO3, NaSe and NaSeO4.

✓ Correct answer

C: SeO2, Na2Se and Na2SeO4.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2013 Paper 1 Variant 1, question 19.

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