Interpretation: The half-reaction that represents reduction is to be chosen from the given options.
Concept Introduction:
With reference to the oxidation number/oxidation state the type of reaction can be concluded, that is, reduction or oxidation.
Answer to Problem 4STP
Correct answer: The correct option is ‘B’.
Explanation of Solution
Reason for correct option: Chromium oxidation number exists between
Manganese oxidation number exists between
Reasons for incorrect options:
Option A is incorrect: In equation I, half reaction
Option C is incorrect: Equation I represents oxidation and III is reduction.
Option D is incorrect: Equation II and III represent reduction but I represent oxidation.
Chapter 20 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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