Consider the reaction-aF eS 2- bO 2- cF e 2 O 3- dSO 2Which of the following options are incorrect for the above reaction-A- N - factor of F eS 2 is 11B- The ratio of moles of a - b is 4- 11C- The ratio of moles of a- b is 11- 4D- The ratio of moles of c - d is 1- 4

The correct option is C The ratio of moles of a : b is 11 : 4In the reaction the nbsp; Oxidation state of Fe changes from +2 to +3 and of sulphur from 1 to ...

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Standard XII

Chemistry

Balancing Redox Equations

Consider the ...

Question

Consider the reaction,
$a F e S_{2} + b O_{2} \to c F e_{2} O_{3} + d S O_{2}$
Which of the following options are incorrect for the above reaction?

N- factor of

F e S_{2}

is 11

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The ratio of moles of a : b is 4 : 11

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The ratio of moles of a : b is 11 : 4

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The ratio of moles of c : d is 1 : 4

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Solution

The correct option is C The ratio of moles of a : b is 11 : 4
In the reaction the
Oxidation state of Fe changes from +2 to +3
and of sulphur from -1 to +4
So, n-factor for $F e S_{2}$ will be:
(no. of atoms * change in O.S) for Fe + (no. of atoms * change in O.S) for S
= 1(3-2) + 2(5)
=11
n-factor for $O_{2}$ = 2*2 =4
Now to balance the reaction we need to croos multiply the n-factors:
So
$4 F e S_{2} + 11 O_{2} \to 2 F e_{2} O_{3} + 8 S O_{2}$
giving a= 4, b= 11, c= 2 d = 8
hence option (c) is the incorrect answer.

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Consider the reaction, aFeS2+bO2→cFe2O3+dSO2 Which of the following options are incorrect for the above reaction?

Consider the reaction,
$a F e S_{2} + b O_{2} \to c F e_{2} O_{3} + d S O_{2}$
Which of the following options are incorrect for the above reaction?