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Redox Reactions

Short Answer Type

111.

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?
$straight K bottom enclose straight I subscript 3$

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112.

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?
$straight H subscript 2 bottom enclose straight S subscript 4 end enclose straight O subscript 6$

108 Views

113.

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?
$bottom enclose Fe subscript 3 end enclose straight O subscript 4$

98 Views

114.

What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?

$bold space bold space bottom enclose bold C bold H subscript bold 3 bottom enclose bold C bold H subscript bold 2 bold OH$

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115.
What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results?
$bottom enclose straight C straight H subscript 3 bottom enclose straight C OOH$

C₂H₄O₂: The oxidation number of C in the acetic acid is given as,
Let the oxidation number of carbon= x
oxidation number of H = +1
Oxidation number of O= (-2)
Thus,

The algebraic sum of all oxidation number gives,

2x+ 4(1) +2(-2)=0
2x+ 4-4=0
2x=0
x=0

However, 0 is average oxidation number of carbon. The two carbon atoms present in this molecules are present in different environments. Hence, they cannot have the same oxidation number. Thus, C exhibits the oxidation states of +2 and -2 in CH₃COOH.

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Long Answer Type

116.

Calculate the oxidation number of sulphur, chromium and nitrogen in H₂SO₅, $space space Cr subscript 2 straight O subscript 7 superscript 2 minus end superscript$ and $space space NO subscript 3 superscript minus$ Suggest structure of these compounds. Count for the fallacy.