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2018 May

This document is a B.Tech I Year examination paper for Engineering Chemistry from Jawaharlal Nehru Technological University Hyderabad, dated May 2018. It consists of two parts: Part A, which is compulsory and contains 10 questions worth 25 marks, and Part B, which includes 5 units with options to answer one question from each unit, totaling 50 marks. The topics covered include electrochemistry, polymerization, water treatment, fuel properties, and phase diagrams.

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32 views2 pages

2018 May

This document is a B.Tech I Year examination paper for Engineering Chemistry from Jawaharlal Nehru Technological University Hyderabad, dated May 2018. It consists of two parts: Part A, which is compulsory and contains 10 questions worth 25 marks, and Part B, which includes 5 units with options to answer one question from each unit, totaling 50 marks. The topics covered include electrochemistry, polymerization, water treatment, fuel properties, and phase diagrams.

Uploaded by

Namasthe Hyderabad
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Code No: 111AE R13

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD


B.Tech I Year Examinations, May - 2018
ENGINEERING CHEMISTRY
(Common to CE, EEE, ME, ECE, CSE, EIE, IT, MCT, ETM, MMT, AE, AME, MIE,
PTM, AGE)
Time: 3 hours Max. Marks: 75

Note: This question paper contains two parts A and B.


Part A is compulsory which carries 25 marks. Answer all questions in Part A.
Part B consists of 5 Units. Answer any one full question from each unit. Each
question carries 10 marks and may have a, b, c as sub questions.

PART- A
(25 Marks)

1.a) Write the cell notation for Calomel Electrode. [2]


b) What is the reason for pitting corrosion to occur? [3]
c) What are the drawbacks of natural rubber? [2]
d) Differentiate Plastic and Resin. [3]
e) What is caustic embrittlement? Write the one preventive method for it. [2]
f) What are the disadvantages of Zeolite process? [3]
g) Define HCV and LCV and write their inter relationship. [2]
h) Write composition and uses of LPG and CNG. [3]
i) Give the principle of Electrophoreses. [2]
j) Mention applications of colloids in industry. [3]

PART-B
(50 Marks)

2.a) Explain determination of pH by using Calomel electrode.


b) What is a fuel cell? Describe construction and working principle of Hydrogen-Oxygen
fuel cell. [5+5]
OR
3.a) Describe mechanism of electrochemical corrosion by taking Rusting of Iron as an
example.
b) Write a note on sacrificial anodic method. [6+4]

4.a) Differentiate between addition and condensation polymerization.


b) Give preparation, properties and engineering applications of
i) Nylon:6 ii) Dacron iii) Bakelite [4+6]
OR
5.a) What are conducting polymers write the classification and applications.
b) Give the applications of Nano materials. [6+4]

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6.a) Explain Ion exchange process for the softening of water.
b) 3.50 ml of a sample water consumed 15 ml of 0.01 EDTA before boiling and 5 ml of the
same EDTA after boiling. Calculate the degree of hardness, permanent hardness and
temporary hardness. [5+5]
OR
7.a) Write about Boiler corrosion.
b) Describe various steps involved in domestic water treatment. [5+5]

8.a) Outline the schematic procedure for synthesis of petrol by Bergius process.
b) Mention the criteria for selecting a good fuel. [5+5]
OR
9.a) Explain Ultimate analysis of coal and give its significance.
b) What is cracking? Describe fixed bed catalytic cracking process with a neat diagram.
[5+5]
10.a) Explain about phase diagram of lead –silver system?
b) Write about:
i) Advantages and limitations of phase rule.
ii) Application of Pb-Ag system in Pattison’s process. [5+5]
OR
11.a) Describe hardening, annealing and normalization.
b) Write a note on Electrical and Optical properties of colloids. [5+5]

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