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12. Which of the following is the wavelength of the mid IR?

A. 50 – 200 μm
B. 0.7 – 2.5μm
C. 2.5 – 50 μm
D. All of the above
13. The principal application of flame emission spectrometry is:
A. Separation of mixture
B. Determination of alkali and alkaline earth metals
C. Fragmentation of analyte
D. Structural identification
14. Analytical method will include all of the following except
A. Preparation and pretreatment of sample
B. Names of instrumentation to be used
C. List of chemicals and reagents to be used
D. Written report of the work done
15. Mass spectrometry measures which one of the following?
A. Concentration of analyte
B. Mobile phase of analyte
C. Fragments of analyte
D. Separation of analyte

1 answer

Here are the answers to your questions:

  1. C. 2.5 – 50 μm
    Mid-infrared (mid IR) wavelengths are typically defined in the range of about 2.5 to 50 micrometers.

  2. B. Determination of alkali and alkaline earth metals
    The principal application of flame emission spectrometry is primarily for the determination of alkali and alkaline earth metals.

  3. D. Written report of the work done
    While preparation, instrumentation, and chemicals are part of analytical methods, a written report is not an analytical method itself but rather a documentation of the findings.

  4. C. Fragments of analyte
    Mass spectrometry is used to measure the mass-to-charge ratio of ions, allowing it to identify and quantify fragments of the analyte.

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