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This quiz contains 10 questions from a mix of 1 subtopics.
Oxidation numbers are numbers given to each atom or ion in a compound that show its degree of...
oxidation
reduction
ionisation
electronegativity
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Which of the following statements is true about oxidation numbers?
more positive oxidation numbers mean atoms or ions are more reduced
more negative oxidation numbers mean atoms or ions are more oxidised
the sum of the oxidation numbers in a compound is always zero
the oxidation number of an element in a monatomic ion is always zero
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In which of the following compounds is the oxidation number of sulfur +4?
sulfuric acid (H2SO4)
sulfur trioxide (SO3)
sulfur hexafluoride (SF6)
sulfur dioxide (SO2)
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What is the oxidation number of chlorine in the perchlorate ion (ClO4-)?
-1
+1
+4
+7
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The oxidation number of hydrogen in metal hydrides such as NaH is .
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The oxidation number of oxygen in peroxides such as H2O2 is .
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In compounds of a non-metal with a non-metal, the more element is given the negative oxidation number.
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What is the oxidation number of oxyen in the compound OF2?
-1
+1
+2
-2
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What is the sum of the oxidation numbers in a compound?
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What is the oxidation number of phosphorus in phosphoric acid, H3PO4?
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