Question

Modified TRUE-FALSE. Write true if the statement is correct and if incorrect, change the underlined word to make the statement correct.

1. IR spectra show absorption bands that enable to determine if certain functional groups are present in a molecule.
2. IR spectra are expressed in wave number.
3. Transmitted light have greater absorbance.
4. (Emission) Absorption spectrum is the light of specific wavelength that is emitted when the atoms relax.
5. When atoms absorb light of specific wavelength that causes the electrons to go to the higher level, emission (absorption) spectrum results.
6. The AAS use absorption spectrometry to assess the (concentration) functional group of an analyte in the sample.
7. The purpose of nebulizer in the AAS is to reduce the fine liquid to aerosol.
8. The monochromator isolates absorption lines from background light due to interferences.
9. For nuclei to flip in into anti parallel state, radio frequency of exactly correct frequency is required.
10. In chromatography, the different components of a mixture are separated from each other based on the differences in affinity for the mobile or stationary phase.
11. Separation of components of the mixture using chromatography is due to the differences in speed of their motion.
12. The liquid used in chromatography that is used as the mobile phase is called eluent.
13. Retention time is the time between sample injection and the apex of the peak
14. In identification of individual components in the sample standard of known composition are needed
15. Each color is characterized by a range of wavelength,

Answer 1