Oxidation state of oxygen in F2O is from Chemistry Redox Reactio

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 Multiple Choice QuestionsMultiple Choice Questions

91.

When KMnO4 acts as an oxidising agent and ultimately forms MnO42-  MnO2, Mn2O3 and Mn2+ then the number of electrons, transferred in each case respectively are

  • 1, 3, 4, 5

  • 3, 2, 1, 4

  • 1, 5, 3, 7

  • 4, 3, 2, 1


92.

In acidic medium, dichromatic ion oxidises ferrous ion to ferric ion. If the gram molecular weight of potassium dichromate is 294 g its gram equivalent weight (in grams) is

  • 24.5

  • 49

  • 125

  • 250


93.

Point out the correct statement.

  • Below 710°C, C is better reducing agent than CO

  • Below 710°C, CO is better reducing agent than C

  • Below 710°C, CO is an oxidising agent

  • Below 710°C, CO, is a reducing agent


94.

KMnO4 reacts with ferrous sulphate according to the following equation,

MnO4- + 5Fe2+ + 8H- Mn2+ + 2Fe3+ + 4H2O

Here, 10 mL of 0.1M KMnO4 is equivalent to

  • 50 mL of 0.1 M FesO4

  • 20 mL of 0.1 M FesO4

  • 40 mL of 0.1 M FesO4

  • 30 mL of 0.1 M FeSO4


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95.

Which of the following species do not show disproportionation on reaction?

ClO-, ClO2- , ClO3- and ClO4-

  • ClO4-

  • ClO4-

  • ClO-

  • None of these


96.

For the reaction,

NH3 + OCl-  N2H4 + Cl-

occurring in basic medium, the coefficient of N2H4 in the balanced equation will be

  • 1

  • 2

  • 3

  • 4


97.

The maximum oxidation state exhibited by actinide ions is

  • +5

  • +4

  • +7

  • +8


98.

In an oxidation-reduction reaction, MnO4- ion is converted to Mn2+. What is the number of equivalents of KMnO4 (mol. wt.= 158) present in 250 mL of 0.04 M KMnO4 solution ?

  • 0.02

  • 0.05

  • 0.04

  • 0.07


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99.

Oxidation state of oxygen in F2O is

  • +1

  • -1

  • +2

  • -2


C.

+2

Let the oxidation state of oxygen in F2O is x.

2(-2) + x = 0 ( , F is more electronegative)

     -2 + x = 0

            x = +2


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100.

Which of the following is wrong statement?

  • Ni(CO)4 has oxidation number +4 for Ni

  • Ni(CO)4 has zero oxidation number for Ni

  • Ni is metal

  • CO is gas


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