Question Paper for Engineering Chemistry(CY100)-Supplementary Examination June/July 2016

KERALA TECHNOLIGICAL UNIVERSITY

FIRST AND SECOND SEMESTER B.TECH SUPPLEMENTARY EXAMINATIONS, JUNE/JULY 2016

CY100-ENGINEERING CHEMISTRY

Max. Marks: 100                                                                                                      Duration: 3 Hours

PART A

Answer all questions, each question carries 2 marks

1.Which of the following molecule can give an IR spectrum? Give reason. (a)H2 (b) N2 (c) HCI (d) Cl2

2.What are redox electrodes? Indicate the-electrode reaction and electrode potential with a suitable example.

3.Distinguish between the terms conductance and specific conductance.

4.What is Kevlar? Mention its two important properties.

5.Differentiate between HCV and LCV.

6.How does graphite act as a lubricant?

7.In the deionisation process water is first passed through cation exchanger and then through anion exchanger. Why?

8.A water sample contains 204 mg of CaSO4 per litre. Calculate the hardness in terms of CaCO3 equivalent?

PART B

Answer all questions, each question carries 3 marks

9.Derive Beer-Lambert’s law.

10.Write the origin of electrode potential. Electrode potential of zinc is assigned a negative value, whereas that of copper a positive value. Give reason.

11.What do you mean by Rf value in chromatography? Give the use of the term in the technique.

12.Give the structure and any two properties of ABS.

13.What are the advantages of liquid fuels over solid fuels?

14. What is the significance of viscosity index of a lubricant? How can you calculate it?

15.How BOD differs from COD?

16.What do you understand by hardness of water? Distinguish between temporary and permanent hardness of water.

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