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Question

What will be (i), (ii) and (iii) if the following reaction is balanced?

i)FeCl3+(ii)MgOFe2O3+(iii)MgCl2


A

(i) = 2, (ii) = 3, (iii) = 3

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B

(i) = 2, (ii) = 4, (iii) = 3

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C

(i) = 3, (ii) = 2, (iii) = 2

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D

(i) = 3, (ii) = 2, (iii) = 3

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Solution

The correct option is A

(i) = 2, (ii) = 3, (iii) = 3


First we balance Fe. We add 2 as the coefficient to FeCl3. Next, to balance Cl, we add 3 to MgCl2. Finally, to balance Mg, we add 3 as the coefficient to MgO. So, the balanced equation is:
2FeCl3+3MgOFe2O3+3MgCl2


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