A-LevelChemistryChemical bonding9701/12 · May/June 2013 · 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?

✓ Correct answer

C: 3

Oracle Prep sorts past-paper questions by topic, so you can drill Chemical bonding and see which topics are most likely to come up next.

Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2013 Paper 1 Variant 2, question 9.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

After black and white photographic film has been developed, unreacted silver bromide is removed by reaction with sodi…

Which molecules have an overall dipole moment? 1 carbon monoxide, CO 2 phosphine, PH₃ 3 carbon dioxide, CO₂

The electrical conductivities of two compounds, Y and Z, are shown in the table. conductivity of the compound in the …

Sodium chloride and sodium iodide react with concentrated sulfuric acid. Which statements are correct? 1 Sodium chlor…

Which compounds can be obtained from but-2-ene in a single reaction? 1 CH₃CH(OH)CH(OH)CH₃ 2 CH₃CH(OH)CH₂CH₃ 3 CH₃CO₂H

Which statements help to explain the mechanism of the reaction between 1-chloropropane and ammonia? 1 1-chloropropane…