# Oxidation Numbers: Question Preview (ID: 14558)

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What is the oxidation number of Chlorine in HClO4? |
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a) +1 | b) +5 | c) +3 | d) +7 | |

The number of nitrogen in N2 is |
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a) +1 | b) 0 | c) +3 | d) -3 | |

What is the oxidation number of Pt in K2PtCl6? |
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a) -2 | b) +2 | c) -4 | d) +4 | |

What is the oxidation number of sulfur in H2SO4? |
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a) 0 | b) -2 | c) +6 | d) +4 | |

What is the oxidation number of nitrogen in (NO3)-1 |
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a) +1 | b) +3 | c) +5 | d) -5 | |

The oxidation number of nitrogen in N2O is |
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a) +1 | b) +2 | c) -1 | d) -2 | |

The oxidation number of manganese in KMnO4 is |
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a) +1 | b) +7 | c) +3 | d) +4 | |

Oxygen has an oxidation number of -2 in |
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a) O2 | b) NO2 | c) Na2O2 | d) OF2 | |

What is the sum of the oxidation numbers in CO2? |
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a) 0 | b) -2 | c) -4 | d) +4 | |

What is the oxidation number of Cr in the dichromate ion (Cr2O7)-2 |
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a) +1 | b) +3 | c) +5 | d) +6 | |

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