A. magnetite
B. haematite
C. carbon(ii)oxide
D. calcium trioxosilicate(iv)

Correct Answer:

Option B – haematite

Explanation

Cast iron + haematite = wrought iron

SEE ALSO  CuO(s) + H2(g) ↔ Cu(s) + H2O(l). What is the effect of increasing the pressure on the equilibrium reaction?

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