Question

# Which of the following represents a correctly balanced half-reaction?

A
Cl2+2eCl
B
2e+FeFe2+
C
O22e+2O2
D
Al3+Al+3e
E
2H++2eH2

Solution

## The correct option is D $$\displaystyle 2{ H }^{ + }+2{ e }^{ - }\rightarrow { H }_{ 2 }$$$$2H^+ + 2e^- \rightarrow H_2$$ This is balanced half reaction as there is equal sum number of elements on each side and the sum of charges on each side is also equal. Chemistry

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