A-LevelChemistryChemical bondingMay/June 2013Paper 1 Q91 Mark
Dicarbon monoxide, C₂O, is found in dust clouds in space. Analysis of it shows that the sequence of atoms in this molecule is C–C–O. All bonds are double bonds and there are no unpaired electrons. How many lone pairs of electrons are present in a molecule of C₂O?
A1
B2
C3
D4
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The correct answer is C. This question tests the candidate's understanding of chemical bonding within the Chemistrysyllabus. The examiner's mark scheme requires...
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