A-LevelChemistryElectrochemistryOct/Nov 2024Paper 1 Q231 Mark
The name 'chlorate' is used for an anion consisting of chlorine and oxygen only. In a molecule of ICl, the iodine atom has oxidation number x and the chlorine atom has oxidation number y. When ICl is added to H2O, iodine is reduced. 4ICl + 2H2O → 4HCl + O2 + 2I2 Which statement about the value of x or y is correct?
Ax is the same as the oxidation number of Cl in the chlorate ion formed when Cl2(aq) is added to cold NaOH(aq).
Bx is the same as the oxidation number of Cl in the chlorate ion formed when Cl2(aq) is added to hot NaOH(aq).
Cy is the same as the oxidation number of Cl in the chlorate ion formed when Cl2(aq) is added to cold NaOH(aq).
Dy is the same as the oxidation number of Cl in the chlorate ion formed when Cl2(aq) is added to hot NaOH(aq).
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The correct answer is A. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
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