NCERT Solutions For Class 12 Chemistry Chapter 6: Class 12 Chemistry Chapter 6 – General Principles and Processes of Isolation of Elements is an important chapter for Class 12 students. Candidates have to practice this chapter thoroughly in order to score good marks in the subject. Therefore, candidates need to first understand all the concepts associated with the chapter. Then, they should start solving the NCERT exercises to test their understanding of this chapter. If they face any difficulty, they can refer to the NCERT Solutions For Class 12 Chemistry Chapter 6 – General Principles and Processes of Isolation of Elements – provided here.
The NCERT Chemistry Chapter 6 Class 12 Solution notes provided here are prepared by the academic experts of Embibe. The solutions are provided in a simplified manner. Thus, students can follow and understand the solutions easily. Following these solutions will help you answer the NCERT exercise questions. Besides that, you can also use it to revise and practice the concepts. In this article, we have provided you with the NCERT Solutions For Class 12 Chemistry Chapter 6 PDF. This will help you to study and practice the chapter in the offline mode as well. Continue reading this article to know more.
NCERT Solutions For Class 12 Chemistry Chapter 6
Before getting into the details of NCERT Solutions For Class 12 Chemistry Chapter 6, let’s have a look at the list of topics and sub-topics covered in this chapter:
|Ex 6.1||Occurrence of Metals|
|Ex 6.2||Concentration of Ores|
|Ex 6.2.1||Hydraulic Washing|
|Ex 6.2.2||Magnetic Separation|
|Ex 6.2.3||Froth Floatation Method|
Extraction of Crude Metal from Concentrated Ore
|Ex 6.4||Thermodynamic Principles of Metallurgy|
|Ex 6.5||Electrochemical Principles of Metallurgy|
Uses of Aluminium, Copper, Zinc and Iron
Now let us move towards the brief description of Class 12 Chemistry Chapter 6.
Chapter Description Of Class 12 Chemistry Chapter 6 – Principles & Processes of Isolation Of Elements
We use various metals for different applications in our day-to-day life. Metals are obtained from the respective metal ores. There are many challenges in converting the raw ore to a usable material matching to our needs.
In this chapter, we will get to know the various terminologies such as concentration, benefaction, calcination, roasting, refining, etc. We will understand the methodologies of oxidation and reduction as used within the extraction procedures. We will easily be able to apply the thermodynamic concepts to the extraction of Aluminium, Copper, Zinc, etc.
Moreover, we will understand why CO is a favorable reducing agent at some specific temperatures. All in all, this Chapter of Chemistry will be helpful for us to understand the several chemical processes associated with the metallurgy.
NCERT Solutions For Class 12 Chemistry Chapter 6 – Principles & Processes of Isolation Of Elements PDF
Students can download the NCERT Class 12 Chemistry Chapter 6 solutions from the link provided below. The solutions can be downloaded as PDF and students can go through it anytime they want. These solutions are provided by our academic experts. Some of the illustrative examples taken from the solution files are given below:
Q: Copper can be extracted by hydrometallurgy but not zinc. Explain.
A: The reduction potential of copper is higher than that of zinc and iron. Thus, in hydro-metallurgy iron and zinc can be used to displace copper from its solution.
Fe(s) + Cu2+(aq) → Fe2+(aq) + Cu(s)
But in order to displace a metal like zinc a metal more reactive than it is required e.g. K, Ca, Mg etc. The metals which are stronger reducing agent than zinc react with water to liberate hydrogen gas. Thus, hydro-metallurgy can extract copper but cannot extract zinc.
Q: What is the role of depressant in froth floatation process?
A: In the froth floatation process, the role of a depressant is to prevent certain types of substances from forming the froth with the air bubbles. For example, NaCN is used as a depressant to separate two sulphide ores, PbS (Lead Sulphide) and (Zinc Sulphide).
4NaCN + Zns → Na2 [Zn(CN)4 ] + Na2S
NaCN forms a complex, Na2 [Zn(CN)4 ] with zinc on the surface of zinc sulphide, thus preventing from forming the froth.
Q: Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
A: ∆fG (Gibbs free energy of formation) of copper (I) sulfite is less than that of hydrogen sulphite and carbon disulphite (CS2). Therefore C and H2S will not be able to reduce Cu2S to Cu. Whereas ∆fG of Cu2O is larger than carbon monoxide(CO). Therefore C can reduce copper (I) oxide to copper.
C(s) + Cu2O(s) → 2Cu(s) + CO(g)
Therefore, it is more difficult to extract copper from copper pyrites than it is to extract from its oxide ore.
If you are satisfied with the solutions provided above, then click on the direct link provided below and download all the NCERT Solutions For Class 12 Chemistry Chapter 6 in PDF.
Chemistry is one of the important subjects in Science. It is a subject that both engineering and medical aspirants must take seriously as both Engineering or Medical entrance examinations have this subject. This is why we have provided the direct links to download the solution files of the next chapters.
FAQs Related to NCERT Solutions for Class 12 Chemistry Chapter 6 PDF Download
Q. What is the occurrence of metals?
A. Mostly, the metals occur in nature in a combined state, but they can sometimes occur in the free state. A native metal is a metal found in its metallic state naturally, either in pure form or in the form of an alloy. Most metals can’t resist natural processes like oxidation, corrosion, etc.
Q. What is leaching explain with example?
A. Leaching is the natural process by which water-soluble substances are washed out from soil or wastes. These leached-out chemicals cause pollution of surface and sub-surface water, for example, In the sugar industry for removing sugar from beets (water is solvent).
Q. What is an electrochemical principle?
A. An electrochemical cell is formed by placing two conducting materials (electrodes) into an electrolyte solution and electronically connecting them. The electrolyte solution is an ionically conducting liquid typically containing a proportion of dissociating salt or acid.
Q. What are the principles of metallurgy?
A. Principles of Metallurgy:
- Crushing and grinding: The first process in metallurgy is crushing ores into a fine powder in a crusher or ball mill. …
- The concentration of ores: The process of removing impurities from ore is known as a concentration of minerals or ore dressing.
Q. What is called refining?
A. Refining (also perhaps called by the mathematical term affining) is the process of purification of a (1) substance or a (2) form. The term is usually used for a natural resource that is almost usable but more useful in its pure form.
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To further boost up your preparation, Embibe also provides free Principles & Processes of Isolation of Elements practice questions. These questions come with detailed solutions. This will help you build your confidence and you can be able to work on your mistakes.
Now we have provided you with the NCERT Solutions For Class 12 Chemistry Chapter 6 along with other necessary resources to master this chapter. We hope the article helps you.
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