Redox reactions

1. 1Oxidation state is the numerical value of the degree of oxidation or reduction of an atom/element

   1. AVerdadeiro
   2. BFalso
2. 2The oxidation state of Fe3+ is

   1. A+3
   2. B-3
   3. C+6
   4. D-6
3. 3The total sum of oxidation states in a compound mustn't add up to zero

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4. 4The sum of oxidation states of all of the elements in a molecular ion must add up to the charge of that ion

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5. 5The maximum oxidation state of an element is '+ group number' e.g. Nitrogen is +5 and the minimum oxidation state of an element its 'group number - 8' e.g. Nitrogen's is 5-8=-3

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6. 6Oxygen has an oxidation state of [blank_start]-2[blank_end] in all compounds apart from peroxides where it is [blank_start]-1[blank_end] and in OF2 where its oxidation state is [blank_start]+2[blank_end]

   1. A-2
   2. B-1
   3. C+2
7. 7Hydrogen has an oxidation state of [blank_start]+1[blank_end] in all compounds except hydrides where it is [blank_start]-1[blank_end]

   1. A+1
   2. B0
   3. C-1
   4. D-1
   5. E0
   6. F+1
8. 8Group 1 elements have an oxidation state of -1

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9. 9Group 2 elements have an oxidation state of +2

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   2. BFalso
10. 10In a simple binary compound, the most electronegative element has the negative oxidation state

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    2. BFalso

11. 11Copper (II) has a 2+ charge

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12. 12An increase in oxidation state is reduction

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    2. BFalso
13. 13An decrease in reduction state is reduction

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14. 14Is Mg being reduced in this equation
    Mg ---> Mg2+ + 2e-

    1. AYes
    2. BNo
15. 15Is Sn being reduced in this equation
    Sn2+ + 2e- ----> Sn

    1. AYes
    2. BNo
16. 16If oxygen atoms are removed, H+ ions can be used to balance the charges

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17. 17In half equations, total charge on the left must be equal to total charge on the right

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    2. BFalso
18. 18[blank_start]Primary[blank_end] alcohols are oxidised to from [blank_start]aldehydes[blank_end] which can be further oxidised to form [blank_start]ketones[blank_end]

    1. APrimary
    2. BSecondary
    3. CTertiary
    4. Daldehydes
    5. Eketones
    6. Fketones
    7. Galdehyde
19. 19Secondary alcohols can be oxidised to form [blank_start]ketones[blank_end]

    1. Aketones

Descrição

Oxidation states, reduction etc

Autor

lukas majda

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English

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