can someone please answer the follwing questions for me please. thank you 14 Rea
ID: 528757 • Letter: C
Question
can someone please answer the follwing questions for me please. thank you
14 Read the statements below referring to 1H-NMR. Which ONE statement is NOT correct? A. The extent of the direct spin-spin interaction diminishes with distance. B. Microwaves are the type of radiation used to obtain NMR spectra. C. The chemical shift can depend upon the electronegativity of the atom to which the proton is chemically attached. D. The relaxation time is the time taken to dissipate the excess spin energy. 15. The intensity of the signals obtained in mass spectrometry depends on several factors. Among the factors given below chose the ONE that does NOT affect the intensity of the s lines A. Stability of the ion generated. B. Sensitivity of the detector. C. Temperature in the analyser. D. Type of ionisation. Give n the molecule 2-pentanone, which ONE of the following can originate from it by electron impact ionisation? A. 2-propenoll" and ethene through a McLafferty rearrangement. B. acetaldehyde] and propane. C. Propane and ethanol. D. Pentane and water. 17. Which ONE of the following are examples of spectroscopic signals A. Emission, resonance and fluorescence. B. Emission, absorption and fluorescence. C. Resonance, absorption and fluorescence. D. Emission, absorption and resonance. 18. Which ONE of the following is NOT indicative of the precision in a data set? A. Standard deviation B. Mean C. Confidence limits D. Relative standard deviationExplanation / Answer
Q14
Answer :Option :A
Q15
Answer :Option :b
Q16
Answer :Option :c
Q17
Answer :Option :b
The key components that influence the decision of ionization mode are the extremity, sub-atomic mass and warm solidness of the compound being examined. If a wrong ionization mode is chosen then no range, or a low quality range, will be acquired. Most specimens will be at first broke down to acquire positive particle spectra, in any case, negative particle spectra can be valuable where the contrarily.charged atom might be more steady than the comparing decidedly charged one and may likewise give correlative auxiliary data through various discontinuity forms.
======
A mass range is a power versus m/z (mass-to-charge proportion) plot speaking to a substance analysis. Hence, the mass range of an example is an example speaking to the dispersion of particles by mass (all the more effectively: mass-to-charge proportion) in a specimen. It is a histogram normally gained utilizing an instrument called a mass spectrometer. Not all mass spectra of a given substance are the same. For instance, some mass spectrometers break the analyte particles into pieces; others watch the in place sub-atomic masses with little discontinuity.
Q14
Answer :Option :A
Q15
Answer :Option :b
Q16
Answer :Option :c
Q17
Answer :Option :b
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.