Chemistry - Oxidation-Reduction

Question - 1

Oxidation is also termed as

  • A electronation
  • B deelectronation
  • C protonnation
  • D deprotonnation

Question - 2

Which one of the following is case of reduction?

  • A \({ Sn }^{ 4+ }\longrightarrow { Sn }^{ 2+ }\)
  • B \({ Sn }^{ 2+ }\longrightarrow { Sn }^{ 4+ }\)
  • C \({ Fe }^{ 2+ }\longrightarrow { Fe }^{ 3+ }\)
  • D \({ Cl }^{ - }\longrightarrow { Cl }^{ 0 }\)

Question - 3

In the reaction \(Zn+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow Zn{ SO }_{ 4 }+{ H }_{ 2 }\)

  • A Zn is oxidised
  • B Zn is reduced
  • C \({ H }_{ 2 }{ SO }_{ 4 }\) is oxidised
  • D \(Zn{ SO }_{ 4 }\) is reduced

Question - 4

In the given reaction \(2Fe{ Cl }_{ 3 }+Sn{ Cl }_{ 2 }\longrightarrow 2Fe{ Cl }_{ 2 }+Sn{ Cl }_{ 4 }\) the substance which is reduced is

  • A Sn2+
  • B Fe3+
  • C Fe2+
  • D Sn4+

Question - 5

In the reaction \(Cu+{ SO }_{ 4 }^{ 2- }+4{ H }^{ + }\longrightarrow { Cu }^{ 2+ }+2{ H }_{ 2 }O+A\) the product A is

  • A SO2
  • B SO3
  • C S2-
  • D S4

Question - 6

In the reaction \(2Mn{ O }_{ 4 }^{ - }+5{ C }_{ 2 }{ O }_{ 4 }^{ 2- }+16{ H }^{ + }\longrightarrow 2M{ n }^{ 2+ }+8{ H }_{ 2 }O+A\) the product A is

  • A CO2
  • B C
  • C CO
  • D \(C{ O }_{ 3 }^{ 2- }\)

Question - 7

In oxygen difluoride the oxidation number of oxygen is

  • A -2
  • B -1
  • C +2
  • D +1

Question - 8

The oxidation number of hydrogen in calcium hydride is

  • A +1
  • B -1
  • C +2
  • D +2

Question - 9

The oxidation number of Mn is +6 in

  • A KMnO4
  • B Mn2O3
  • C MnO2
  • D K2MnO4

Question - 10

The oxidation number of iron in the reaction \([Fe\left( { CN } \right) _{ 6 }]^{ 4- }\longrightarrow [Fe\left( { CN } \right) _{ 6 }]^{ 3- }\) changes from

  • A -4 to -3
  • B -3 to -2
  • C +2 to +3
  • D +3 to +2
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