You visited us 2 times! Enjoying our articles? Unlock Full Access!

Extraction of Iron

In the metall...

Question

In the metallurgy of iron, limestone is added along with haematite ore and coke. What is main use of limestone?

Limestone decomposes to

C a O

and

C O_{2}

which reacts with coke to produce CO which is used to reduce haematite directly to iron

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Limestone on decomposition produce

C a O

which is used to react with

F e_{2} O_{3}

to form slag of

C a F e O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Limestone on decomposition produce

C a O

which is used to react with

F e_{2} O_{3}

to form slag of

C a F e O_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Limestone on decomposition produce

C a O

which is used to react with

S i O_{2}

to form slag of

C a S i O_{3}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Limestone on decomposition produce $C a O$ which is used to react with $S i O_{2}$ to form slag of $C a S i O_{3}$
(a) Haemetite is never converted directly into iron.
(b) $C a O$ reacts with acidic impurity of $S i O_{2}$ , and the formation of slag can be given as:
$C a O + S i O_{2} \to C a S i O_{3}$
So, option (d) is correct.

Suggest Corrections

Similar questions

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

{SiO}_{2}

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}

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

Join BYJU'S Learning Program