Meausrement 11.3

Determine the index of hydrogen deficiency (IHD) of paracetamol.

• 3

• 4

• 5

• 6

Which spectra would show the difference between propan-2-ol, CH₃CH(OH)CH₃, and propanal, CH₃CH₂CHO?

I.   mass

II.  infrared

III. ¹H NMR

• I and II only

• I and III only

• II and III only

• I, II and III

What is the index of hydrogen deficiency (IHD) in cyclohexanol?

• 0

• 1

• 2

• 3

Which region of the electromagnetic spectrum is used to identify hydrogen environments in a molecule?

• X-ray

• UV

• IR

• radio waves

What is the degree of unsaturation (index of hydrogen deficiency) for the molecule?

• 1

• 2

• 4

• 5

What can be deduced from the infrared (IR) spectrum of a compound?

• Number of hydrogens

• Number of hydrogen environments

• Bonds present

• Molar mass

Which is correct for the spectra of organic compounds?

• Mass spectroscopy provides information about bond vibrations.

• ¹H NMR spectroscopy provides the values of carbon–hydrogen bond lengths.

• Infrared spectroscopy provides the number of hydrogen atoms.

• Mass spectroscopy provides information about the structure.

What is the ratio of areas under each signal in the ¹H NMR spectrum of 2-methylbutane?

• 6 : 1 : 2 : 3

• 3 : 3 : 1 : 5

• 6 : 1 : 5

• 3 : 3 : 1 : 2 : 3

What is the index of hydrogen deficiency, IHD, of 3-methylcyclohexene?

• 0

• 1

• 2

• 3

What is the ratio of the areas of the signals in the ¹H NMR spectrum of pentan-3-ol?

• 6:4:1:1

• 6:2:2:2

• 5:5:1:1

• 3:3:2:2:1:1