C 14-met-mng-aei-104-engg chemistry

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A/AA/CHST/AEI/FW/MET/
MNG/IT/TT/PKG –104
4004
BOARD DIPLOMA EXAMINATION, (C–14)
OCT/NOV—2016
FIRST YEAR (COMMON) EXAMINATION
ENGINEERING CHEMISTRY AND
ENVIRONMENTAL STUDIES
Time : 3 hours ] [ Total Marks : 80
PART—A 4×10=40
Instructions : (1) Answer all questions.
(2) Each question carries four marks.
(3) Answers should be brief and straight to the point and
shall not exceed four simple sentences.
1. (a) Define atomic number and mass number.
(b) Find the atomic number and mass number of an element
having 9 protons and 10 neutrons.
2. (a) Define coordinate covalent bond. Give an example.
(b) Calculate the oxidation number of S in H SO2 4 and N in HNO3.
3. (a) Define solute and solvent.
(b) Find the molarity of solution containing two moles of solute
dissolved in 5 litres of solution.
4. (a) What is conjugate acid-base pair? Give an example.
(b) Find the pH of 0·02 M HCl solution.
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5. (a) Write any two differences between metallic conductors and
electrolytic conductors.
(b) Define chemical equivalent and electrochemical equivalent.
6. (a) Define degree of hardness and write its units.
(b) Define temporary hardness and permanent hardness.
7. (a) Define addition polymerisation with one example.
(b) Write the preparation and uses of BUNA-S rubber.
8. (a) Write any two characteristics of a good fuel.
(b) Write the composition and uses of producer gas.
9. (a) Define the terms BOD and COD.
(b) Define producers and consumers.
10. (a) Define the two types of energy sources with one example each.
(b) Write any two effects of ‘greenhouse effects’.
PART—B 10×4=40
Instructions : (1) Answer any four questions.
(2) Each question carries ten marks.
(3) Answers should be comprehensive and the criterion
for valuation is the content but not the length of the
answer.
11. (a) Explain the four quantum numbers with their
significances. 8
(b) Draw the shapes of s-orbital and p-orbital. 2
12. (a) What is normality? Find the normality of a solution
prepared by dissolving 20 gm of NaOH in 2 litres of
solution. 4
(b) Explain Arrhenius theory of acids and bases. 6
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13. (a) Explain roasting and calcination with examples. 6
(b) Write any four characteristics of metals. 4
14. (a) Describe the construction and working of galvanic cell. 7
(b) The electrochemical equivalent of a metal is
0·00028 gram/coulomb. Calculate the weight of metal
deposited by the passage of 10 amperes of current for ten
minutes. 3
15. (a) Explain sacrificial anode process with example. 6
(b) Explain the formation of composition cell and stress cell. 4
16. (a) Describe the method of municipal water treatment with a
diagram. 7
(b) Write any three essential qualities of drinking water. 3
17. (a) Explain condensation polymerisation. Give the example of
formation of bakelite. 4
(b) Write the preparation and uses of the following : 6
(i) PVC
(ii) Urea-formaldehyde
(iii) Neoprene
18. (a) Explain the causes of air pollution. 6
(b) Define the terms ecosystem and biodiversity. 4
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/4004 3 AA6(T)—PDF

C 14-met-mng-aei-104-engg chemistry

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