UNIT-I
Atomic Structure and Chemical Bonding.
1. Explain Bohr's model of an atom.
2. Write down the electronic configuration and name of elements which has atomic number 24, 26 and 29.
3. Give a detail account of Quantum numbers and their significance.
4. Give the electronic configurations of following elements:
(i) B (ii) Al (iii) Cl- (iv) Fe (v) Cu (vi) Cr (vii) Fe+3
5. Distinguish between- Ionic and covalent bond
- Covalent and co-ordinate bond
6. What is coordinate bond? Define it with example. Show coordinate bond in the formation of Ammonium chloride and boron tri - fluoride.
7. Explain electro-valent bonding. Out of the following which one is not having electrovalent bonding:
(i) NaCl (ii) CaCl2 (iii) AlCl3 (iv) CCl4
8. Give the electronic configuration of the followings ions:
(i) Cu+2 (iii) Cr+3 (iii) Fe+2 (iv) Cl- (v) S-2
9. What type of hybridisation is associated with the central atom when the atoms attached to it from a regular tetrahedron ?
10. Define hybridisation. Give one example of a molecule in sp, sp2 and sp3 types hybridisation.
11. State and explain Heisenberg's uncertainty principle?
12. State and explain de Broglie's relation.
13. Explain the shapes of atomic orbitals.
14. Find the quantum numbers for electron in n = 2 .
15. Calculate all possible values of l and m for n = 2 .
UNIT - 2. Water
1. Name the chief sources of water.
2. Differentiate between temporary and permanent hardness.
3. Describe a method for the determinatio of hardness in water.
4. What do you mean by dgree of hardness of water ? Describe the determinatio of total hardness of water by E.D.T.A method.
5. Differentiate between temporary and permanent hardness of water. Describe the determination of total hardness of water by E.D.T.A method.
6. Write short notes on
(i) Lime soda process
(ii) Biological oxygen demand (BOD).
(iii) Dissolve Oxygen (DO).
7. Discuss the principle involved in soda lime process of softening what are its advantages.
8. A water sample contain 2 mg CaCl2 per litre. Calculate the hardness in terms of CaCO3 equivalent.
9. A water sample contains 242mg CaSO4 per litre. Calculate the hardness in terms of CaCO3 equivalent.
10. 250 ml of a water sample on EDTA titration EBT consumed 13 ml of 0.022 N EDTA till end point reached. Calculate the hardness of water?
11. 50 ml of a sample water consumed 150 ml of 0.01 M-EDTA before boiling and 5 ml of the same EDTA after boiling. Calculate the degree of total hardness, permanent hardness and temporary hardness.
UNIT - 3. Engineering Materials.
1. Write down the name and formulae of important ore obtaining aluminium. Describe a method for obtaining aluminium metal from its important ore.
2. Write down the name and formulae of different ore of iron. How is iron extracted from its ore? Write any one method.
3. Write down the name and formulae of important ores of copper. How is copper extracted from its ore?
4. Write notes on the following :
(i) Nylon 6,6 (ii) Smelting (iii) Calcination
(iv) Roasting (v) Ore
5. Differentiate between the following
(i) Calcination and roasting
(ii) Gangue and Flux
6. Draw the cross-linked structure of bakelite, urea formaldehyde resin and melamine resin.
7. Differentiate between thermoplastic and thermosetting polymers.
8. Write a note on vulcanization of rubber.
9. Write short notes on
(i) Difference between thermoplastic and thermosetting plastic.
(ii) Bakelite
(iii) Thermosetting plastic
(iv) Application of plastic in Engineering
10. What is vulcanization ? How does it improve the property of natural rubber?
11. Define and explain the term addition and condensation polymerization. Give one example of each.
12. Explain the term copolymerisation and give two example.
13. What are natural and synthetic polymers?
14. Distinguish between the term homopolymer and copolymer and give an example of each.
UNIT. IV. Chemistry of Fuel and Lubricants.
1. What is fuel? Give complete classification of fuels with examples.
2. What are different type of fuels? What are characteristics of a good fuel.
3. What in meant by calorific values of a fuel?
4. Describe how the calorific value of a solid fuel is determined using a bomb calorimeter.
5. What do you understand by higher and lower calorific values of fuels?
6. Write the characteristics of and ideal fuel.
7. Why the octane number of gasoline so important ? What is its signification?
8. Explain cetane number of diesel fuel.
9. Define lubricants. Discus the classification of lubricants with suitable examples.
10. What are the characteristics of a good lubricants.
11. Define lubricants. What do you mean by viscosity index?
UNIT - 5. Electrochemistry
1. Describe the Arrhenius. Theory of ionisation.
2. What is battery? Explain the different types of batteries taking with a suitable example of each type.
3. What is a primary cell? Explain the Leclanche cell.
4. What are secondary cell? Explain the construction and working of lead - acid battery. Write down the reactions taking place during changing and discharging of the battery.
5. How will you distinguish between:
(i) Metallic conduction and electrolytic conduction.
(ii) Strong and weak electrolytes.
6. What is the function of salt bridge in an electrochemical cell?
7. Describe the construction and working of Leclanche cell.
8. What is a fuel cell? Explain construction and working of fuel cell.
9. Explain giving reaction how it can be recharged.
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