10007 B
Reg. No.: Name:
FIRST SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2016
Course Code: CY100
Course Name: ENGINEERING CHEMISTRY

Max. Marks: 100 Duration: 3 Hours
Part A

Answer all questions, each question carries 2 marks

1. The absorbance of ೩ 0.0184 dye solution in ethanol is 0.62 in a 2cm cell’ for light of
wavelength 5000 A°. If the path length of light through the sample is doubled and the
concentration is made half, what will be the value of absorbance?

2. A zinc wire is dipped in silver nitrate solution taken in beaker A and a silver wire is dipped
in zinc sulphate solution taken in beaker B. Predict in which beaker the ions present will get
reduced. Given that the standard reduction potential of zinc and silver are -0.76V and 0.80V
respectively.

3. Write the essential components of gas chromatography equipment.

4. What is poly aniline? Give its structure and two applications.

5. What is cetane number?

6. Write two examples of solid lubricants. Compare their structure.

7. Hard water does not produce much lather with soaps or detergents. Give reason.

8. Write the significance of BOD.

(8 x 2 = 16 Marks)

Part B
Answer all questions, each question carries 3 marks

9. Write three points of comparison between UV and IR spectrum.

10. Write three advantages of hydrogen - oxygen fuel cell.

11. Define the term cell constant.The specific conductivity of a 0.3N KCI solution at 27°C is 0.028
ऽ ണ്‌. Resistance of the cell containing this solution 15 300 ohms. Determine cell constant.

12. What is the nature of bonding in carbon nanotubes? Write two applications of carbon
nanotubes (CNTs).

13. Write the composition and uses of natural gas

14. What is viscosity index (1.1)? Oils having high viscosity need not necessarily have high V.I
Comment

15. Give three points of difference between aerobi¢ oxidation and anaerobic oxidation

16. What are ion exchange resins? Give examples for cation and anion exchange resins

: (8 x 3 =24 Marks)