Redox reactions

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

   1. AVerdadero
   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

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

   1. AVerdadero
   2. BFalso
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

   1. AVerdadero
   2. BFalso
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

   1. AVerdadero
   2. BFalso
9. 9Group 2 elements have an oxidation state of +2

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

    1. AVerdadero
    2. BFalso

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

    1. AVerdadero
    2. BFalso
12. 12An increase in oxidation state is reduction

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

    1. AVerdadero
    2. BFalso
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

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

    1. AVerdadero
    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

Descripción

Oxidation states, reduction etc

Autor

lukas majda

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English

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chemistryredoxas level

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