10 Questions
What does the Index of Hydrogen Deficiency (IHD) provide information about?
The number of hydrogen molecules needed to convert a molecule to the corresponding saturated, non-cyclic molecule
How is the IHD calculated for a compound containing CxHy?
(2x+2-y)/2
Which atoms are ignored when using the IHD formula?
Oxygen and sulfur atoms
What is the purpose of counting halogens as hydrogen in the IHD formula?
To account for their similar properties to hydrogen atoms
How is the degree of unsaturation related to the IHD?
The degree of unsaturation is another term for IHD
What is the Index of Hydrogen Deficiency for ethyne, C$_2$H$_2$?
2
What is the Index of Hydrogen Deficiency for methylbenzene, C$_6$H$_5$CH$_3$?
4
Which peak in a mass spectrum gives information about the molecular mass of a compound?
Molecular ion (M+) peak
How can the structure of an unknown compound with the same molecular mass as another be further determined?
By analyzing its fragmentation patterns in the mass spectrum
What does the [M+1] peak in a mass spectrum depend on?
Number of carbon atoms present in the molecule
Test your knowledge of spectroscopic identification in IB Chemistry DP with this quiz covering topics such as Index of Hydrogen Deficiency, Mass Spectrometry, Nuclear Magnetic Resonance Spectroscopy, and Infrared Spectroscopy.
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