Bharathidasan University 2008 B.B.A ENGLISH COMPOSITION AND BUSINESS CORESPONDENCE - Question Paper

PART – A (10 x two = 20 Marks)

1. discuss the term pH value.

2. How is moisture content in a solid material expressed?

3. What is the need for monitoring the content of carbon monoxide in air?

4. Mention the applications for smoke meter.

5. describe retention time.

6. How is resolution estimated in a chromatogram?

7. elaborate monochromators?

8. List the sources used in Atomic Absorption spectrometry.

9. What is dead time in a GM counter?

10. Sketch a typical NMR spectrum.

PART – B (5 x 16 = 80 Marks)

11.i) List the kinds of electrodes used for pH measurement. discuss the construction details of 1 of them. Why is reference electrode needed for pH measurement? (8 )

ii) define a method of measuring dissolved oxygen content in the boiler feed water? (8 )

12.a)i) discuss the use of thermal conductivity gauge for the analysis of flue gas. (8 )

ii) define the construction details and working of a dust monitor. (8 )

OR

12.b)i) discuss the principle of operation of a paramagnetic oxygen analyzer with a neat sketch. (8 )

ii) define the working of an analyzer that can be used to estimate the content of nitrogen oxide in a gas. (8 )

13.a)i) discuss with a schematic diagram the different parts and their functions in gas chromatography. (10)

ii) On a particular 25cm long column of a chromatograph, benzene had retention time of 33min and a peak width of 15.1min. compute the number of theoretical plates in the column and height equivalent of a theoretical plate (HETP). (6)

OR

13.b)i) discuss with sketches the operation of any 2 detectors used in gas chromatography.
(10)

ii) What is HPLC? explain its advantages and applications. (6)

14.a)i) discuss with a schematic diagram the operation of a double beam UV spectrometer. Mention its advantages over a single beam instrument. (10)

ii) The molar absorptivity of a compound in aqueous solution at 765nm is 1.54 x 103. The percentage transmittance of a solution in a cell with a 1cm path length is 43.2. obtain the concentration of the solution. (6)
OR
14.b)i) define the radiation sources and detectors used in IR spectrophotometers. (8 )

ii) discuss the use of flame emission spectrometry for qualitative and quantitative analysis. (8 )

15.a)i) Draw the schematic diagram of a mass spectrometer and discuss its principle of operation. (8 )

ii) define the working of proportional counter and scintillation counter. (8 )
OR
15.b)i) When does nuclear magnetic resonance occur? discuss the working of NMR spectrometer with a schematic diagram. (10)

ii) Write short notes on X ray spectroscopy. (6)

Earning:   Approval pending.