Question
Which of the following information is primarily obtained from infrared spectroscopy? A) arrangement of carbon and hydrogen atoms in a compound B) molecular weight of a compound C) conjugated pi system present in a compound D) functional groups present in a compound E) all of these Which of the following information primarily obtained from mass spectrometry? A) arrangement of carbon and hydrogen atoms in a compound B) molecular weight of a compound C) conjugated n system present in a compound D) functional groups present in a compound E) all of these Which of the following information is primarily obtained from nuclear magnetic resonance spectroscopy? A) arrangement of carbon and hydrogen atoms in a compound B) molecular weight of a compound C) conjugated pi system present in a compound D) functional groups present in a compound E) all of these Which of the following is true about the number of signals in a ^1 H NMR spectrum? A) it indicates the number of neighboring protons B) it indicates the electronic environment of neighboring protons C) it indicates the number of different kinds of protons D) it indicates the electronic environment of absorbing protons E) it indicates the number of protons, in the signal What is the multiplicity of the methylene hydrogens indicated in the proton NMR of the following compound? A) doublet B) triplet C) quartet D) pentet Separatory funnel is commonly used in the organic laboratory as a way to: A) remove a reaction solvent B) purify an organic liquid C) separate the components of an immiscible liquid mixture D) purify an organic solid E) separate the components of a miscible liquid mixture
Explanation / Answer
4)
Answer:- D) Functional groups present in a compound
The compounds having change in dipole moment show the IR absorption, & the presence of functional groups are primarly determined using the IR spectroscopy.
The arrangement of carbon & hydrogen atoms in a compound is determined by NMR spectroscopy
Molecular weight of compound is determined by mass spectroscopy.
Conjugated pi system present in compound can be detrmined by UV spectroscopy.
5)
Answer:- B) Molecular weight of a compound
6)
Answer:- A) The arrangement of carbon & hydrogen atoms in a compound
7)
Answer:- C) It indicates the number of different kind of protons
the different kind of protons will give different shift value in PPM in NMR spectra.
8)
Answer:- D) Pentet
9)
Answer:- C) seperate the components of an immiscible liquid mixture
