Virtual Labs

a: Nitrogen is an inert gas. b: Oxygen present may be converted to ozone by far-UV light from the high intensity arc, and ozone will damage optical surfaces c: Nitrogen Gas(N2)makes up 78.03% of the air. d: None of the above are correct

3. Why it is essential to run a blank spectrum with buffer or solvent system before measuring the spectrum for sample:

a: In order to check that the absorbance and High Tension voltage is not excessive. b: To measure the absorbance of buffer. c: Selection of good buffer. d: All of the above are correct

4. Why the regulation of temperature of the cell holder is important:

a: Why the regulation of temperature of the cell holder is important: b: To keep the sample in homogenized state and avoid sample denaturation. c: To maintain the temperature of the buffer or solvent used. d: None of the above are correct.

5. How much time is required for the machine to warm up and achieve stability

a: 1 min b: 10 min c: 15 min d: 30 min

6. The optimum path length generally required for:

a: Far UV CD spectra. b: Near UV CD spectra. c: None of the above are correct. d: Both (A) and (B) are correct.

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