Question

# The number of electrons lost in the following change is :$$Fe+{ H }_{ 2 }O\longrightarrow { Fe }_{ 3 }{ O }_{ 4 }+{ H }_{ 2 }$$

A
2
B
4
C
6
D
8

Solution

## The correct option is C 8$$3\overset { 0 }{ Fe } +8{ e }^{ - }\longrightarrow { \left( { Fe }^{ { 8 }/{ 3+ } } \right) }_{ 3 }$$         $$2{ H }^{ \oplus }\longrightarrow \overset { 0 }{ { H }_{ 2 } } +2{ e }^{ - }\times 4$$_______________________________$$3Fe+4{ H }_{ 2 }O\longrightarrow { Fe }_{ 3 }{ O }_{ 4 }+4{ H }_{ 2 }O$$_______________________________Total number of electrons lost or gained is 8.Chemistry

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