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Chemical Reactivity

Which of the ...

Question

Which of the following oxides react to form slag in open hearth process?

C a O, C O

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P_{2} O_{4}, C a O

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P_{2} O_{5}, S i O_{2}

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C a O, {C O}_{2}

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Solution

The correct option is A $C a O, C O$
${C a C O_{3}}_{(s)} ⟶ C a O_{(s)} + {C O_{2}}_{(g)}$
$S i O_{2} + C a O ⟶ {C a S i O_{3}}_{(s l a g)}$
The calcium oxide formed by the decomposition reacts with various acidic impurities in the iron (mainly silica) to form slag which is essentially calcium silicate $(C a S i O_{3})$ .

Suggest Corrections

Similar questions

S i O_{2} + C a O \to C a S i O_{3}

F e O + S i O_{2} \to F e S i O_{3}

C a O + P_{2} O_{5} \to C a_{3} (P O_{4})_{2}

C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r

M g C O_{3} + S i O_{2} \to M g S i O_{3} + C O_{2}

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

{SiO}_{2}

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

C + O_{2} \to C O_{2}

C O_{2} + C \to 2 C O

C a C O_{3} \to C a O + C O_{2}

C a O + S i O_{2} \to C a S i O_{3}

F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}

C a O, C O,

C O_{2}, N_{2} O_{5}, S O_{3}

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