JEE Questions for Chemistry Redox Reactions Quiz 1 - MCQExams.com

HNO3 acts as
  • acid
  • oxidizing agent
  • reducing agent
  • both 1 and 2
Which of the following involves a redox reaction?
  • Reaction of H2SO4 with NaOH
  • Production of ozone from oxygen in the atmosphere by lightning
  • Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightning
  • Evaporation of water
In Br3O8 compound, oxidation number of bromine is
  • 16/13
  • 26/3
  • 24/3
  • 16/3
Oxidation state of oxygen in H2O2 is
  • -1
  • +2
  • 1/2
  • -2

Chemistry-Redox Reactions-6832.png
  • 32
  • 64
  • 16
  • 8
Which one of the following oxidation states is not possible in metal carbonyls ?
  • +1
  • 0
  • -1
  • +2
What is the oxidation number of Pt in K [Pt NH3 Cl5] ?
  • 0
  • +1
  • +2
  • +4
Among the following, identify the species with an atom in +6 oxidation state

  • Chemistry-Redox Reactions-6834.png
  • 2)
    Chemistry-Redox Reactions-6835.png

  • Chemistry-Redox Reactions-6836.png

  • Chemistry-Redox Reactions-6837.png
The oxidation number of iron in Fe3O4 is
  • + 2
  • + 3
  • 8/3
  • 2/3

Chemistry-Redox Reactions-6660.png
  • + 3, + 6 and + 5
  • + 5, + 3 and + 6
  • – 3, + 6 and + 6
  • + 5, + 6 and + 6
The oxidation number of chromium in potassium dichromate is
  • +2
  • +4
  • +6
  • +8
Oxidation number of N in N3H (hydrazoic acid) is
  • - 1/3
  • +3
  • 0
  • - 3
In which of the following compounds, the oxidation number of iodine is fractional ?
  • IF3
  • IF5

  • Chemistry-Redox Reactions-6663.png
  • IF7
When K2Cr2O7 is converted into K2CrO4, the change in oxidation number of chromium is
  • 0
  • 5
  • 7
  • 9
What is the oxidation state of P in Ba( H2 PO2 )2 ?
  • +1
  • +2
  • +3
  • - 1
The oxidation state of I in IPO4 is
  • +1
  • +3
  • +5
  • +7
The oxidation number of xenon in XeOF2 is
  • zero
  • +2
  • +4
  • +3

Chemistry-Redox Reactions-6665.png
  • +6
  • +3
  • +2
  • - 2

Chemistry-Redox Reactions-6666.png

  • Chemistry-Redox Reactions-6667.png
  • iodide is oxidised
  • H2O is one of the products
  • All the above
Hydrogen peroxide in its reaction with KIO4 and NH2 OH respectively, is acting as a
  • reducing agent, oxidising agent
  • reducing agent, reducing agent
  • oxidising agent, oxidising agent
  • oxidising agent, reducing agent
The ratio of oxidation states of Cl in potassium chloride to that in potassium chlorate is
  • + 1/ 5
  • - 1/5
  • - 2/5
  • + 3/5
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
  • Zn acts as an oxidising agent when it reacts with HNO3
  • HNO3 is weaker acid than H2SO4 and HCl
  • In electrochemical series, Zn is above hydrogen

  • Chemistry-Redox Reactions-6670.png

Chemistry-Redox Reactions-6672.png
  • I and II
  • II and III
  • I and III
  • I, II and III
Which of the following species contain an element in an oxidation state that is not a whole number?

  • Chemistry-Redox Reactions-6673.png
  • Mn2O3

  • Chemistry-Redox Reactions-6674.png
  • Cl2O7
If Cl2 is passed through hot aqueous NaOH, the products formed have Cl in different oxidation states. These are indicated as
  • -1 and +1
  • -1 and +5
  • +1 and +5
  • -1 and +3

Chemistry-Redox Reactions-6676.png
  • H+
  • 2)
    Chemistry-Redox Reactions-6677.png
  • Br-
  • Mn2+
The oxidation state and covalency of Al in [AlCl (H2O)5 ]2+ respectively are
  • + 6, 6
  • + 3, 6
  • + 2, 6
  • + 3, 3
In which of the following, oxidation number of chlorine is + 5 ?
  • Cl -
  • ClO -

  • Chemistry-Redox Reactions-6679.png

  • Chemistry-Redox Reactions-6680.png

Chemistry-Redox Reactions-6681.png
  • 5, 1, 6
  • 1, 5, 6
  • 6, 1, 5
  • 5, 6, 1
The oxidation number and the electronic configuration of sulphur in H2 SO4 is
  • +4; 1s2, 2s2, 2p6, 3s2
  • +2; 1s2, 2s2, 2p6, 3s2, 3p2
  • +3; 1s2, 2s2, 2p6, 3s2, 3p1
  • +6; 1s2, 2s2, 2p6
0:0:1


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