# Metallurgy- FAQ in JEE

Metallurgy

Metallurgy deals with the study of physical and chemical behavior of metallic elements, intermetallic compounds, and their mixtures, which are known as alloys. It is one of the simplest topics to score marks in JEE. The problems involving metallurgy are direct and less time taking. JEE (joint entrance examination) consists of three subjects namely, physics, chemistry and mathematics. In these subjects, chemistry is thought to be the most scoring one and hence concern should first be given to chemistry. Questions asked in JEE generally follow a pattern and hence going through important topics at the last moment always helps.

1. What are the important topics in metallurgy that need to be focused for JEE?

According to JEE syllabus the significant topics in metallurgy are:

• Details on metals and their extraction processes (Gold, Silver, Iron, Zinc, Aluminium, etc.)
• Ores and minerals
• Refining methods which include liquation, distillation, electro-refining, zone refining and vapor phase refining.
• Purification methods which includes magnetic separation, froth floatation process and leaching.

The topic of metallurgy covers 2-3% marks in chemistry paper and these topics require intensive reading and memory to retain the knowledge.

2. How is copper extracted from low-grade copper ores?

Copper can be obtained from low-grade copper ores by the process of leaching using acid or bacteria. Leaching is a process in which an ore is treated with a suitable reagent which dissolves the ore but not the impurities.

The solution obtained from leaching is then treated with scrap iron or hydrogen gas to get copper. Following are the reaction that take place:

Cu2+ (aq) + Fe $ightarrow$ Cu(s) + Fe 2+ (aq)

Cu2+ (aq) + H2(g) $ightarrow$ Cu(s) + 2H + (aq)

3. Which books should be referred for metallurgy in order to crack JEE?

Go through NCERT Textbook for CBSE Class 12th, this book contains all the details in a very precise way. A thorough study of this book can help you to understand the various extraction processes. The important points that are given in NCERT that need to be memorized. Try finding patterns and codes to remember the points in  a structured manner. NCERT is good enough for metallurgy, for further information or reference J.D. Lee’s book on inorganic chemistry can be used.

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#### Practise This Question

If 3 concave mirrors are cut from a sphere and put in the given set up and if the sun lies on the principle axis of mirror 2 at infinity, then at what position will the images of the sun be formed by three mirrors?