Which of the following is not a redox reaction ? from Chemistry

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 Multiple Choice QuestionsMultiple Choice Questions

111.

Substances that are oxidised and reduced in the following reaction are respectively

N2H4 (l) + 2H2O2 (l) N2 (g) + 4H2O (l)

  • N2H4, H2O

  • N2H4, H2O2

  • N2, H2O2

  • H2O, N2


112.

During the decomposition of H2O2 to give oxygen, 48 g O2 is formed per minute at a certain point of time. The rate of formation of water at this point is

  • 0.75 mol min-1

  • 1.5 mol min-1

  • 2.25 mol min-1

  • 3.0 mol min-1


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113.

Which of the following is not a redox reaction ?

  • KCN + Fe(CN)2 K4[Fe(CN)6]

  • Rb + H2 RbOH + H2

  • H2O2  H2O + O

  • CuI2  CuI + I2


A.

KCN + Fe(CN)2 K4[Fe(CN)6]

KCN + Fe(CN)2 → K4[Fe(CN)6]

This is not redox reaction .


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114.

Consider the reaction ,

Fe2+  Fe3+ + e-

  • the reaction towards the left is a reduction

  • the reduction towards the right is a reduction

  • the reaction towards the right is an oxidation

  • the reaction towards the right is an oxidation and the reaction towards the left is an reduction


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115.

Oxidation state of iron in haemoglobin is

  • 0

  • +2

  • -2

  • +3


116.

Which of the following statement is not true for hydrolysis of XeF6?

  • XeOF4 is formed.

  • XeO2F2 is formed.

  • It is a redox reaction.

  • XeO3 is formed


117.

When SO2 gas is passed through an acidified K2Cr2O7 solution :

  • the solution becomes blue

  • SO2 gets reduced

  • Cr(SO4)3 is formed

  • the solution becomes colourless


118.

In the following reaction ,

P4 + 3NaOH + 3H2 PH3 + 3NaH2PO2

  • phosphorus is oxidised

  • phosphorus is oxidised and reduced

  • phosphorus is reduced

  • sodium is oxidised


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119.

Which of the following ion does not exist?

  • [CuI4]2-

  • VO43-

  • WO42-

  • CrO42-


120.

MnOin an acidic medium dissociates into

  • MnO2 and MnO4-

  • MnO and MnO4-

  • MnO2 and MnO

  • MnO2 and MnO3


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