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This quiz contains 5 questions from a mix of 1 subtopics.
What do oxidation numbers represent?
The overall charge of an atom
The number of neutrons in an atom
The number of protons in an atom
The number of electrons gained or lost by an atom
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Which of the following statements about oxidation numbers is true?
Uncombined elements always have an oxidation number of 0
The sum of oxidation numbers in a compound is equal to the overall charge of the compound
Hydrogen atoms always have an oxidation number of +1
Oxygen atoms always have an oxidation number of -1
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Which of the following is an example of an oxidising agent?
I-
MnO4-
CO3
H2
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What happens to the oxidation number during reduction?
It decreases
It remains the same
It depends on the specific reaction
It increases
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What is the purpose of observing colour changes in redox reactions?
To identify the oxidising agent
To determine the overall charge of the compound
To visually confirm the occurrence of oxidation and reduction
To identify the reducing agent
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