O-LevelChemistryBonding & Structure5070/12 · Oct/Nov 2017 · Q181 Mark

Compound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction, ΔΗ. What information can be deduced about Y and its reaction with oxygen?

ACompound Y can be used as a fuel.

BCompound Y could be a hydrocarbon.

CIn the reaction the energy needed to break bonds is greater than the energy released when bonds are made.

DIn the reaction the products are at a lower energy level than the reactants.

✓ Correct answer

C: In the reaction the energy needed to break bonds is greater than the energy released when bonds are made.

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

Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 18.

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