12th Chemistry Metallurgy
Prepare for the Tamil Nadu 12th Chemistry Public Examination with carefully selected Chapter 1 – Metallurgy Important 2 Mark Questions. These chapter-wise questions are designed to help students revise key concepts quickly, strengthen their understanding, and improve confidence for the board examination.
01
Chapter Number
50 +
Question Papers
TN Board
Latest Syllabus
Most Repeated 2 Mark Questions
Curated from Previous Year Question Papers
Explain Mond’s process of refining Nickel.
The impure nickel is heated in a stream of carbon monoxide at around 350 K.
The nickel reacts with the CO to form a highly volatile nickel tetracarbonyl .
The solid impurities are left behind.
On heating the nickel tetracarbonyl around 460 K, the complex decomposes to give pure metal .
What are the differences between minerals and ores?
| Minerals | Ores |
|---|---|
| Naturally occurring substances obtained by mining which contain the metals in free state or in the form of compounds like oxides, sulphides etc. are called minerals. | Minerals that contain high percentage of metal from which it can be extracted conveniently and economically are called ores. |
| All minerals are not ores. | All ores are minerals. |
|
Example:
Clay – Mineral of aluminium
|
Example:
Bauxite – Ore of aluminium
|
What is the role of Limestone in the extraction of Iron from its oxide Fe2O3?
In this extraction, a basic flux, limestone (CaO), is used.
Since the silica gangue present in the ore is acidic in nature, the limestone combines with it to form calcium silicate (slag) .
What are the various steps involved in extraction of pure metals from their ores?
The various steps involved in the extraction of pure metals from their ores are:
Which type of ore can be separated by froth floatation method? Give two examples.
Sulphide ores can be concentrated by froth floatation method.
Examples:
Define Gangue and slag.
The non-metallic impurities, rocky materials and siliceous matter present in the ores are called gangue .
Example: SiO2 is the gangue present in the iron ore Fe2O3.
Slag is a fusible chemical substance formed by the reaction of gangue with a flux.
Write short notes on Auto reduction.
Simple roasting of some of the ores gives the crude metal. In such cases, the use of reducing agents is not necessary.
For example, mercury is obtained by roasting of its ore cinnabar (HgS).
Describe the role of the following in the process mentioned.
Silica acts as an acidic flux to remove FeO as slag FeSiO3 in the extraction of copper.
Cryolite serves as an added impurity and lowers the melting point of Al2O3.
First iodine forms a volatile tetraiodide with impure metal, which decomposes to give pure metal.
Impure zirconium metal is heated in an evacuated vessel with iodine to form the volatile zirconium tetraiodide (ZrI4). The impurities are left behind, as they do not react with iodine.
Sodium cyanide acts as a depressing agent in froth floatation process.
When a sulphide ore of a metal of interest contains other metal sulphides, the depressing agent sodium cyanide selectively prevents other metal sulphides from coming to the froth.
Appeared Once Questions
Curated from Previous Year Question Papers
Explain Acid leaching with an example.
Leaching of sulphide ores such as ZnS, PbS etc., can be done by treating them with hot aqueous sulphuric acid .
In this process the insoluble sulphide is converted into soluble sulphate and elemental sulphur .
How copper matte is formed?
In the extraction of copper from copper pyrites, the concentrated ore is heated in a reverberatory furnace after mixing with silica, an acidic flux.
The ferrous oxide formed due to melting is basic in nature and it combines with silica to form ferrous silicate (slag) .
The remaining metal sulphides Cu2S and FeS are mutually soluble and form a copper matte .
What’s Next?
Continue your journey through Lesson 1 – Metallurgy. Master the important Three Mark and Five Mark questions, or explore the complete 12th Physics study guide covering every chapter.
12th Chemistry Chapter 1 Metallurgy Important 2 Marks Questions
Preparing from previous year question papers is one of the best ways to score high marks in Class 12 Chemistry public exams. In this page, students can find important 2 marks questions from Chapter 1 Metallurgy based on Tamil Nadu State Board syllabus. These questions are collected from previous year public examination papers and repeated important questions.
The chapter Metallurgy is an important unit in 12th Chemistry because it contains concepts related to extraction of metals, concentration of ores, roasting, calcination, refining processes, Ellingham diagram, and metallurgy principles. Students can use these important 2 mark questions for quick revision before examinations.
Practicing 12th Chemistry Metallurgy important questions helps students:
- Understand important concepts clearly
- Improve answer writing skills
- Identify repeated board exam questions
- Prepare for school tests and public exams
- Score better marks in Chemistry examinations
These previous year 2 marks questions are useful for:
- Tamil Nadu State Board Class 12 Students
- Public Exam Preparation
- Quarterly and Half-Yearly Exams
- Revision Before Board Exams
- NEET and Competitive Exam Basics
Students are advised to practice all important 2 mark questions from Metallurgy along with textbook back questions and important derivations. Regular revision of previous year questions can improve confidence and help in better time management during exams.
You can also explore other 12th Chemistry study materials including:
- Important 1 Mark Questions
- 3 Marks and 5 Marks Questions
- Chapter Wise Notes
- Previous Year Question Papers
- Important Diagrams
- Book Back Answers
- Public Exam Most Expected Questions
For more chapter-wise 12th Chemistry important questions and study materials, visit Padidaa.com.
