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Which of the following is not a rule for...

Which of the following is not a rule for calculating oxidation number ?

A

For ions, oxidation number is equal to the charge on the ion.

B

The oxidation number of oxygen is -2 in all of its compounds.

C

The oxidation number of fluorine is -1 in all of its compounds.

D

Oxidation number of hydrogen is +1 except in binary hydrides of alkali metals and alkaline earth metals where it is -1.

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The correct Answer is:
To determine which of the following statements is not a rule for calculating oxidation numbers, we will analyze each option provided. ### Step-by-Step Solution: 1. **Understand the Rules for Oxidation Numbers**: - The oxidation number of an element in a compound can be determined by a set of established rules. 2. **Evaluate Each Option**: - **Option 1**: "For ions, the oxidation number is equal to the charge of the ion." - This statement is **correct**. The oxidation number of a monatomic ion is indeed equal to its charge. - **Option 2**: "The oxidation number of oxygen is -2 in all of its compounds." - This statement is **incorrect**. While oxygen typically has an oxidation number of -2, in peroxides (like H2O2), it has an oxidation number of -1, and in superoxides, it has an oxidation number of -1/2. - **Option 3**: "The oxidation number of fluorine is -1 in all its compounds." - This statement is **correct**. Fluorine is the most electronegative element and always has an oxidation number of -1 in its compounds. - **Option 4**: "The oxidation number of hydrogen is +1 except in binary hydrides of alkali metals and alkaline earth metals." - This statement is **correct**. Hydrogen typically has an oxidation number of +1, but in hydrides of alkali metals (like NaH) and alkaline earth metals (like CaH2), it has an oxidation number of -1. 3. **Conclusion**: - The only statement that is not a rule for calculating oxidation numbers is **Option 2**: "The oxidation number of oxygen is -2 in all of its compounds." ### Final Answer: The statement that is not a rule for calculating oxidation numbers is **Option 2**. ---
To determine which of the following statements is not a rule for calculating oxidation numbers, we will analyze each option provided. ### Step-by-Step Solution: 1. **Understand the Rules for Oxidation Numbers**: - The oxidation number of an element in a compound can be determined by a set of established rules. 2. **Evaluate Each Option**: ...
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Knowledge Check

  • Which of the following arrangements represent increaseing oxidation number of the central atom?

    A
    `CrO_(2)^(-),ClO_(3)^(-),CrO_(4)^(2-),MnO_(4)^(-)`
    B
    `ClO_(3)^(-),CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-)`
    C
    `CrO_(2)^(-),ClO_(3)^(-),MNO_(4)^(-),CrO_(4)^(2-)`
    D
    `CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-),ClO_(3)^(-)`

  • Which of the following arrangements represent increasingg oxidation number of the central atom?

    A
    `CrO_(2)^(-),ClO_(3)^(-),CrO_(4)^(2-),MnO_(4)^(-)`
    B
    `ClO_(3)^(-),CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-)`
    C
    `CrO_(2)^(-),ClO_(3)^(-),MnO_(4)^(-),CrO_(4)^(2-)`
    D
    `CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-),ClO_(3)^(-)`

  • Which of the following rules is not related to weight' training?

    A
    Concentrating on the muscles during exercise.
    B
    Maintaining a good rhythm during exercise.
    C
    Resting between the sets for 30 to 60 seconds.
    D
    Not warming up and stretching before the workouts.
    • NCERT FINGERTIPS ENGLISH-REDOX REACTIONS-MCQs (OXIDATION NUMBER)
    1. Which of the following is not a rule for calculating oxidation number...

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    2. The oxidation number of carbon in CH(2)Cl(2) is

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    3. Oxidation state of iron in Fe(CO)(4) is

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    4. The oxidation states of sulphur in the anions SO(3)^(2-), S(2)O(4)^(2-...

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    5. Oxidation numbers of Mn in its compounds MnCl(2),Mn(OH)(3),MnO(2) and ...

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    6. Arrange the oxides of nitrogen in increasing order of oxidation state ...

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    7. The oxidation state of S in H(2)S(2)O(8) is

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    8. Match the compounds given in column I with oxidation states of carbon...

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    9. Among the following identify the species with an atom in +6 oxidation ...

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    10. The pair of the compounds in which both the metals are in the highest ...

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    11. An element that never has a positive oxidation state in any of its com...

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    12. Oxidation number if iodine in IO(3)^(-), IO(4)^(-),KI and I(2) respect...

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    13. Various oxidation states of few elements are mentioned. Which of the o...

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    14. Carbon is in the lowest oxidation state in

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    15. Which of the following is a decreasing order of oxidation states of t...

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    16. Which compound amongst the following gas the highest oxidation number ...

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    17. Match the column I with column II and mark the appropriate choice.

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    18. In which of the following compounds oxidation state of chlorine has tw...

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    19. The oxidation number of nitrogen in (N(2)H(5))^(+) is

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    20. Fill up the table from the given choice.

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