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Redox Reactions

Long Answer Type

101.

Determine the oxidation number of C in the following:

$bold left parenthesis bold i bold right parenthesis bold space bold C subscript bold 2 bold H subscript bold 6 bold space bold space bold space bold space bold space bold space bold space bold space bold space bold left parenthesis bold ii bold right parenthesis bold space bold C subscript bold 4 bold H subscript bold 10 bold space bold space bold space bold space bold space bold space bold space bold space bold space bold left parenthesis bold iii bold right parenthesis bold space bold CO bold left parenthesis bold iv bold right parenthesis bold space bold CO subscript bold 2 bold space bold space bold space bold space bold space bold space bold space bold space space space$

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102. Determine the oxidation number of:
(i) Mn in KMnO₄ (ii)Cr in K₂Cr₂O₇(iii) Cl in KClO₄?

(i) KMnO₄.
Let the oxidation number of Mn=x
Writing the oxidation number of each atom at the top of its symbol,
+1 x -2
K Mn O₄The algebraic sum of the oxidation number of various atoms = 0

(ii)
Let the oxidation number of Cr = x
Writing the oxidation number of each atom at the top of tis symbol,
+1 x -2
K₂ Cr₂ O₇
The algebraic sum of the oxidation number of various atoms = 0

Let the oxidation number of Cl = x
Writing the oxidation number of each atom at the top of its symbol,
+1 x -2
K Cl O₄
The algebraic sum of the oxidation number ofvarious atoms = 0

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Short Answer Type

103. Assign oxidation number of the underlined elements in each of the following species:

space space space NaH subscript 2 bottom enclose straight P straight O subscript 4

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104. Assign oxidation number of the underlined elements in each of the following species:

NaH bottom enclose straight S straight O subscript 4

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105. Assign oxidation number of the underlined elements in each of the following species:

straight H subscript 4 bottom enclose straight P subscript 2 end enclose straight O subscript 7

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106. Assign oxidation number of the underlined elements in each of the following species:

straight K subscript 2 bottom enclose Mn straight O subscript 4

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107. Assign oxidation number of the underlined elements in each of the following species:

Ca bottom enclose straight O subscript 2 end enclose

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108. Assign oxidation number of the underlined elements in each of the following species:

Na bottom enclose straight B straight H subscript 4

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109. Assign oxidation number of the underlined elements in each of the following species:

straight H subscript 2 bottom enclose straight S subscript 2 end enclose straight O subscript 7

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110. Assign oxidation number of the underlined elements in each of the following species:

KAl left parenthesis bottom enclose straight S straight O subscript 4 right parenthesis subscript 2. space 12 straight H subscript 2 straight O

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