Quiz  /  Mass Spectroscopy Class 12 MCQ Questions With Answers

  • 1. 
    Identify the bonds which will produce strong absorptions in the IR region of the electromagnetic spectrum.I. C-O bondII. C=C bondIII. C=O bond

  • I and II only
  • I and III only
  • II and III only
  • I, II and III

  • 2. 
    In a flame test the ______________are excited

  • protons
  • neutrons
  • electrons
  • bonds

  • 3. 
    Splitting occurs only in

  • low resolution H NMR
  • high resolution H NMR
  • low resolution C NMR
  • high resolution C NMR

  • 4. 
    Which of the following would be different for 1-butanol and 2-butanol

  • The number of peaks on low res H NMR
  • the molar mas
  • the number of peaks in C NMR
  • the finger print region of the infrared spectrum

  • 5. 
    The finger print region is

  • different for each organic compound
  • from 600 - 1400 cm-1
  • both the above

  • 6. 
    The number of peaks in 13C NMR for CH3 CH2 CH3 is

  • 0
  • 1
  • 2
  • 3

  • 7. 
    The splitting pattern for the hydrogen bonded to the oxygen in CH3CH(OH)CH3

  • 0
  • 1
  • 2
  • 3

  • 8. 
    The independent variable on an IR spectra is

  • wave length
  • wave number
  • frequency squared
  • transmission

  • 9. 
    What part of the atom or molecule does infrared radiation affect

  • the nucleus
  • the electrons
  • the  bonds
  • the charge

  • 10. 
    An Infrared spectroscopy of an organic molecule indicates the presence of a C=C and at least one C-C bond The molecule also contains at least one amino group,but no carbonyl(C=O) groups the molecule could be

  • propanamide
  • 1-aminoprop-1-ene
  • 2-methyl-2-aminopropane
  • 3-aminobutane

  • 11. 
    Stronger bonds absorb IR at

  • higher wave numbers
  • lower wave numbers
  • in the finger print region
  • 600cm-1

  • 12. 
    Which of the following type of electromagnetic radiation has the longest wavelength

  • infrared
  • ultraviolet
  • microwaves
  • radiowaves

  • 13. 
    A molecule absorbs IR at a wavenumber of 1720 cm-1. Which functional group could account for this absorption.I. aldehydesII. estersIII. ethers

  • I only
  • I and II
  • I, II and III
  • none of the above

  • 14. 
    molecule than has a broard band at 3400 cm-1 and no sharp peak at around 1680 cm-1

  • amide
  • ester
  • alkanol
  • carboxylic acid

  • 15. 
    The number of peaks in 1H NMR for CH3 CH2 CH3 is

  • 0
  • 1
  • 2
  • 3

  • 16. 
    The splitting pattern for the Hydrogen on the carbon at the end in high resolution 1H NMR for CH3 CH2 CH3

  • a sextet
  • a heptet
  • a triplet
  • isa quartet

  • 17. 
    NMR can only be done with

  • molecules
  • 1H and 13C
  • any element with a odd number of protons
  • any element with a odd number of nucleons

  • 18. 
    A molecule has a broadband at 3200cm-1 and sharp band at 1711cm-1. the molecule is most likely an

  • amide
  • ester
  • alkanol
  • carboxylic acid

  • 19. 
    NMR is used to determine

  • the function groups present in inorganic molecules
  • the molar mass of the compound
  • the structure of the molecule
  • the number of different carbon or hydrogen enviroments in the molecule

  • 20. 
    The actual wavelength which is absorbed by any bond can vary.

  • True
  • False

  • 21. 
    A molecule has a band at 3500cm-1 and sharp band at 1711cm-1. the molecule is most likely an

  • amide
  • ester
  • alkanol
  • carboxylic acid

  • 22. 
    The greater the polarity of a bond the_______________its IR absorption

  • weaker
  • stronger
  • more charged
  • smaller the wavenumber

  • 23. 
    Which of the following type of electromagnetic radiation has the most energy

  • infrared
  • ultraviolet
  • microwaves
  • radiowaves
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