AS-9701-REDOX REACTION-1

what is oxidation

• gain of electrons

• loss of electrons

• decrease in oxidation number

which species is oxidised?

2H₂S+SO₂→3S+2H₂O 

• H₂S

• SO₂

• S

• H₂O

which species is reduced?

CH₂=CH₂ + H₂ → CH₃CH₃ 

• CH₂=CH₂

• H₂

• CH₃CH₃

• none

which stage is reduction?

N₂ -> NH₃ -> NO -> NO₂ -> HNO₃

• 1

• 2

• 3

• 4

what is the oxidation number of Cl?

ClO₂⁻

• -1

• +1

• +3

• +5

what is the oxidation number of S?

SO₄²⁻

• -2

• +2

• +4

• +6

what is the oxidation number of O?

H₂O₂

• -2

• -1

• +1

• +2

what is the formula of

manganese(IV) oxide

• MnO

• MnO₄

• Mn₂O₇

• MnO₂

which is the oxidising agent?

2Fe²⁺ + H₂O₂ + 2H⁺ → 2Fe³⁺ + H₂O

• Fe²⁺

• Fe³⁺

• H₂O₂

• H⁺

which is the oxidising agent?

IO⁻ + NO₂⁻ → I⁻ + NO₃⁻

• IO⁻

• NO₂⁻

• I⁻

• NO₃⁻