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? asked in Science & MathematicsChemistry · 1 decade ago

chemistry Redox reaction MCQ help needed?

Please solve these two MCQ's for me:

1. Hydrogen sulphide reacts with sulphur dioxide according to the equation

2H2S + SO2 ? 3S + 2H2O

Which statement is TRUE about the reaction?

a) Hydrogen sulphide oxidises sulphur dioxide to sulphur.

b) Hydrogen sulphide oxidises sulphur dixoide to water.

c) Sulphur dioxide oxidises hydrogen sulphide to sulphur

d) Sulphur dioxide oxidises hydrogen sulphide to water

2. Which gaseous substance has nitrogen in its lowest oxidation state?

a) N2O

b) NH3

c) NO

d) NO3

2 Answers

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  • Old Science Guy
    Lv 7
    1 decade ago
    Favorite Answer

    1

    c) Sulphur dioxide oxidises hydrogen sulphide to sulphur

    this is true but not the whole story

    because

    hydrogen sulfide in turn reduces sulfur dioxide to sulfur, also

    2

    b) NH3

    N is -3 here

    all the rest are positive for N

  • Gervald F
    Lv 7
    1 decade ago

    1 c

    2 b

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