Q.1
molecule than has a broard band atcm-1 and no sharp peak at aroundcm-1
  • amide
  • ester
  • alkanol
  • carboxylic acid
Q.2
The independent variable on an IR spectra is
  • wave length
  • wave number
  • frequency squared
  • transmission
Q.3
The dependent variable on an IR spectra is
  • wave length
  • wave number
  • frequency
  • transmission
Q.4
Non polar symmetrical molecules
  • do not absorb IR radiation
  • absorb IR  radiation
  • absorb the most IR  radiation
  • transmit IR radiation
Q.5
Mass of attached atoms affect the absorbance of the bond
  • True
  • False
Q.6
The finger print region is
  • different for each organic compound
  • from 600 - 1400 cm-1
  • both the above
Q.7
The actual wavelength which is absorbed by any bond can vary.
  • True
  • False
Q.8
Element X has 2 isotopes. X-and X-For everyatoms of X,of them have a mass of 125.0 amu andhave a mass of 126.0 amu. What is the average atomic mass of X?
  • 125.3 amu
  • 125.7 amu
  • 126.3 amu
  • 126.7 amu
Q.9
A molecule has a band at 3500cm-1 and sharp band at 1711cm-the molecule is most likely an
  • amide
  • ester
  • alkanol
  • carboxylic acid
Q.10
The greater the polarity of a bond the_______________its IR absorption
  • weaker
  • stronger
  • more charged
  • smaller the wavenumber
Q.11
What part of the atom or molecule does infrared radiation affect
  • the nucleus
  • the electrons
  • the  bonds
  • the charge
Q.12
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
Q.13
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
Q.14
Which of the following type of electromagnetic radiation affects the bonds,vibrating ,stretching rocking...
  • infrared
  • ultraviolet
  • microwaves
  • radiowaves
Q.15
Which of the following type of electromagnetic radiation has the most energy
  • infrared
  • ultraviolet
  • microwaves
  • radiowaves
Q.16
In a flame test the ______________are excited
  • protons
  • neutrons
  • electrons
  • bonds
Q.17
Which of the following type of electromagnetic radiation affects spin of the nucleons
  • infrared
  • ultraviolet
  • microwaves
  • radiowaves
Q.18
Carbon has three known isotopes. Which is the most abundant?
  • carbon-12.011
  • carbon-12
  • carbon-13
  • carbon-14
Q.19
What do the peaks on the mass spectrum represent?
  • anions
  • different isotopes
  • atoms with differing numbers of electrons
  • numbers of electrons
Q.20
What do the heights of the peaks represent in the mass spectrum?
  • number of isotopes
  • relative abundance of each isotope
  • average atomic mass
  • charge:mass ratio
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