General principle and processes of isolation of elements part-1
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NCERT Class 12 Chemistry Chapter-wise Solutions
- 1 – The Solid State
- 2 – Solutions
- 3 – Electrochemistry
- 4 – Chemical Kinetics
- 5 – Surface Chemistry
- 6 – General Principles and Processes of Isolation of Elements
- 7 – The p-Block Elements
- 8 – The d-and f-Blocks Elements
- 9 – Coordination Compounds
- 10 – Haloalkanes and Haloarenes
- 11 – Alcohols, Phenols and Ethers
- 12 – Aldehydes, Ketones and Carboxylic Acids
- 13 – Amines
- 14 – Biomolecules
- 15 – Polymers
- 16 – Chemistry in Everyday Life
CHAPTER SIX GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
- 6.1 Occurrence of Metals
- 6.2 Concentration of Ores
- 6.3 Extraction of Crude Metal from Concentrated Ore
- 6.4 Thermodynamic Principles of Metallurgy
- 6.5 Electrochemical Principles of Metallurgy
- 6.6 Oxidation Reduction
- 6.7 Refining
- 6.8 Uses of Aluminium, Copper, Zinc and Iron
NCERT Solutions class 12 Chemistry Isolation of elements part 1
Chapter End Question
Part-I
1. Copper can be extracted by hydrometallurgy but not zinc. Explain.
2. What is the role of depressant in froth floatation process?
3. Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
4. Explain: (i) Zone refining (ii) Column chromatography.
5. Out of C and CO, which is a better reducing agent at 673 K?
6. Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?
7. Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
8. Write chemical reactions taking place in the extraction of zinc from zinc blende.
9. State the role of silica in the metallurgy of copper.
10. What is meant by the term “chromatography”?
11. What criterion is followed for the selection of the stationary phase in chromatography?
12. Describe a method for refining nickel.
13. How can you separate alumina from silica in bauxite ore associated with silica? Give equations, if any.
14. Giving examples, differentiate between ‘roasting’ and ‘calcination’.
covers both organic and inorganic chemistry. Please note that CBSE has reduced the syllabus for class 12 Chemistry. So, you must check the latest syllabus of CBSE while going through the NCERT solution of any chapter given in the class 12 NCERT book.