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Q.

Change in oxidation number of carbon when methane is subjected to combustion

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a

$- 4 to zero$

b

$- 4 to + 4$

c

$- 4 to + 2$

d

$+ 4 to - 4$

answer is C.

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Detailed Solution

$\overset{}{\overset{- 4}{C} H_{4}} + 2 O_{2} \to \overset{}{\overset{+ 4}{C} O_{2}} + 2 H_{2} O$

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Change in oxidation number of carbon when methane is subjected to combustion