
In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ions end up in:
A. Slag
B. Gangue
C. Metallic calcium
D. Calcium carbonate
Answer
163.8k+ views
Hint: In metallurgy or specially in the process smelting, molten of fusible metal is produced from infusible ore. This process generally takes place in the presence of heat, reducing agent and flux.
Complete Step by Step Answer:
Limestone is actually calcium carbonate. Calcium carbonate in a blast furnace decomposes to produce calcium dioxide along with carbon dioxide.
The reaction can be given as follows:
$CaC{{O}_{3}}\to CaO+C{{O}_{2}}$
In this reaction one mole of calcium carbonate is heated to form one mole of metal oxide ore that is calcium oxide along with carbon dioxide gas.
Blast furnace contains silicon dioxide. This calcium dioxide combines with the silicon dioxide to form calcium silicate.
The reaction can be given as follows:
$CaO+Si{{O}_{2}}\to CaSi{{O}_{3}}$
Slag is a compound of calcium oxide and silicon dioxide. Thus slag is produced in the metallurgy of iron, when limestone is added to the blast furnace.
Thus the correct option is A.
Note: Due to the action of limestone metal is smelted out of its ore and the ore appears to be in a glassy state. This glassy appearance of the ore is caused by the formation of slag during the smelting process on the surface of the ore.
Complete Step by Step Answer:
Limestone is actually calcium carbonate. Calcium carbonate in a blast furnace decomposes to produce calcium dioxide along with carbon dioxide.
The reaction can be given as follows:
$CaC{{O}_{3}}\to CaO+C{{O}_{2}}$
In this reaction one mole of calcium carbonate is heated to form one mole of metal oxide ore that is calcium oxide along with carbon dioxide gas.
Blast furnace contains silicon dioxide. This calcium dioxide combines with the silicon dioxide to form calcium silicate.
The reaction can be given as follows:
$CaO+Si{{O}_{2}}\to CaSi{{O}_{3}}$
Slag is a compound of calcium oxide and silicon dioxide. Thus slag is produced in the metallurgy of iron, when limestone is added to the blast furnace.
Thus the correct option is A.
Note: Due to the action of limestone metal is smelted out of its ore and the ore appears to be in a glassy state. This glassy appearance of the ore is caused by the formation of slag during the smelting process on the surface of the ore.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Main 2025 Session 2: Exam Date, Admit Card, Syllabus, & More

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Trending doubts
Types of Solutions

Degree of Dissociation and Its Formula With Solved Example for JEE

Classification of Drugs

Instantaneous Velocity - Formula based Examples for JEE

JEE Main Chemistry Question Paper with Answer Keys and Solutions

JEE Main Chemistry Online Mock Test for Class 12

Other Pages
Haloalkanes and Haloarenes

Alcohol Phenol and Ether Class 12 Notes: CBSE Chemistry Chapter 7

Coordination Compounds Class 12 Notes: CBSE Chemistry Chapter 5

NCERT Solutions for Class 12 Chemistry In Hindi Chapter 10 Haloalkanes and Haloarenes In Hindi Mediem

Total MBBS Seats in India 2025: Government College Seat Matrix

NEET Total Marks 2025: Important Information and Key Updates
