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Chemistry 1 Tamil notes unit 5 👇
Chemistry 1 important questions
Unit-1
1. Explain in detail about aufbau principle for filling of electrons in an atom with suitable example.
2.Define valency of an element.
3.Explain electrovalent bond with suitable
example with a neat diagram
4.Distinguish between s and d-block elements im the periodic table
Define pH of a solution. Calculate the pH of
0.025 N sodium hydroxide solution
Unit-2
1.Distinguish between lyophilic and lyophobic
colloids.
2.Define colloid. Describe any four industrial , Applications of colloids.
3.List the industrial applications of catalyst.
4.What is called nanotechnology? Illustrate the various applications of nanotechnology in various fields of Engineering.
Unit-3
1.Describe the manufacture of steel by Bessemer process.
2.What is meant by heat treatment of steel? Write notes on various heat treatment of steel.
3.Explain the extraction of tungsten from its
4. Describe the process and applications of powder metallurgy.
Unit-4
1.Distinguish between ordinary chemical reaction and nuclear reaction.
2. Define half-life period. The decay constant of Co-60 is 0.132/yr. Calculate its half-life period. If the quantity of Co-60 is 2.6g, what will be the quantity that remain after 10.5
3. Describe the manufacture of Portland cement 4.Define refractory. What are the requirements of a refractory?
Unit-5.
1.Explain vulcanization of rubber and give the properties of vulcanized rubber
2.Write a note on advantage of composite materials over metals and polymers
3.What are bio-materials? List biomedical uses of use following: (a) Polyurethane (b) PVC (c) Polypropylene (d) Polyethylene
4. Write a note on the following abrasives. (a) Diamond (b) Corundum (c) Emery (d) Garnet
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