2018 · Q5
Consider the following chemical reaction: aFe2O3(s) + bCO(g) → cFe(s) + dCO2 In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?
General KnowledgeChemistry
- A3, 2, 3, 1
- B1, 3, 2, 3
- C2, 3, 3, 1
- D3, 3, 2, 1
Explanation
Let the coefficients be a, b, c and d. Balancing iron gives 2a = c, balancing carbon gives b = d, and balancing oxygen gives 3a + b = 2d. With a = 1, we get c = 2, and then 3 + b = 2b gives b = 3 and d = 3. The balanced equation is Fe2O3 + 3CO → 2Fe + 3CO2, so the coefficients are 1, 3, 2, 3.