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Science
Mass Spectroscopy
Quiz 2
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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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