Which of the following wavelength ranges is associated with UV spectroscopy?

• 0.8-500 0.8 - 500µm

• 400 - 100nm

• 380 - 750nm

• 0.01 - 10nm

Which of the following techniques would be most useful to identify and quantify the presence of a known impurity in a drug substance?

• NMR

• MS

• IR

• HPLC

Calculate the index of hydrogen deficiency for a compound with the molecular formula C6H6O.

• 1

• 2

• 3

• 4

A hydrocarbon contains 85.7% carbon by mass. Its 1H NMR spectrum shows two signals in the ratio of 3:1.

Which compound is consistent with this data?

• but-1-ene

• 2-methylprop-1-ene

• propane

• propene

What is the full form of NMR?