Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 31

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Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $H_{2} O_{2}$ acts as a reducing agent in the acid medium?

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Important Questions on Redox Reactions

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 32

In which of the following reactions, hydrogen peroxide acts as an oxidizing agent?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 33

The reaction,

3 C l O^{-} (a q) \to C l O_{3}^{-} (a q) + 2 C l^{-} (a q)

is an example of -

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 34

Chlorine on reaction with hot and concentrated sodium hydroxide gives.

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 35

Amongst the following identify the species with an atom with +6 oxidation state.

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 36

In the standardization of

{Na}_{2} S_{2} O_{3}

using

K_{2} {Cr}_{2} O_{7}

by iodometry, the equivalent weight of

K_{2} {Cr}_{2} O_{7}

is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 38

Consider the following list of reagents: Acidified

K_{2} {Cr}_{2} O_{7},

alkaline

{KMnO}_{4},

{CuSO}_{4},

H_{2} O_{2},

{Cl}_{2}

,

O_{3}

,

{FeCl}_{3}

,

{HNO}_{3}

. The total number of reagents that can oxidise aqueous iodide to iodine are

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 39

Number of electrons transferred in each case when

{KMnO}_{4}

acts as an oxidising agent to give

{MnO}_{2}

,

{Mn}^{2 +}, Mn (OH)_{3}

and

{MnO}_{4}^{2 -}

are, respectively:

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 40

Which one of the following exhibits the largest number of oxidation states?