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Chemistry Part-I

General Principles and Processes of Isolation of Elements

Write down the reactions taking place in different zones in th

Chemistry Part-I

Class 12

NCERT

Chapter 1: The Solid State

31 questions

Chapter 2: Solutions

54 questions

Chapter 3: Electrochemistry

28 questions

Chapter 4: Chemical Kinetics

40 questions

Chapter 5: Surface Chemistry

27 questions

Chapter 6: General Principles and Processes of Isolation of Elements

30 questions

Name the common elements present in the anode mud in electrolytic refining of copper. Why are they present?

Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

Write chemical reactions taking place in the extraction of zinc from zinc blende.

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Chapter 7: The p-Block Elements

62 questions

Chapter 8: The d-and f-Block Elements

48 questions

Chapter 9: Coordination Compounds

38 questions

Question

Easy

Solving time: 1 mins

Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

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Chemistry Part-I (NCERT)

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Text solutionVerified

In blast furnace, iron oxides are reduced at different temperature ranges. In the lower part of the blast furnace, the temperature is as high as

2200 K

. It is called combustion zone. At the top, the temperature is as low as

500 - 800 K

. It is called reduction zone. In the lower temperature range, carbon is the reducing agent and in the higher temperature range,

CO

is the reducing agent. In the reduction zone (

500 - 800 K

), following reactions occur.

3 F e_{2} O_{3} + CO \to 2 F e_{3} O_{4} + C O_{2}

F e_{3} O_{4} + 4 CO \to 3 F e + 4 C O_{2}

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

In the temperature range 900-1500 K, following reactions occur.

C + C O_{2} \to 2 CO

F e O + CO \to F e + C O_{2}

Around 1270 K (middle portion), decomposition of limestone gives lime (

C a O

) and

C O_{2}

. Lime is a flux and combines with silicate impurity to form slag of calcium silicate.

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}

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Practice more questions from Chemistry Part-I (NCERT)

Name the common elements present in the anode mud in electrolytic refining of copper. Why are they present?

Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

Write chemical reactions taking place in the extraction of zinc from zinc blende.

View all

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Question Text	Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
Topic	General Principles and Processes of Isolation of Elements
Subject	Chemistry
Class	Class 12
Answer Type	Text solution:1
Upvotes	84

Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

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Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

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