Infra Red Spectroscopy

1) Which of the following is not a source used in Mid Infrared Spectrophotometer?

• Nernst glower

• High pressure mercury arc lamp

• Globar

• Nichrome wire

Which of the following is the wave number of near infrared spectrometer?

• 4000 – 200 cm-1

• 200 – 10 cm-1

• 12500 – 4000 cm-1

• 50 – 1000 cm-1

Which of the following options are correct in terms of wavelength for the different types of IR spectrometer?

• Near IR: 0.8 – 2.5 mm

• Mid IR: 0.8 – 2.5 mm

• Far IR: 2.5 – 50 mm

• Mid IR: 50 – 100 mm

Which of the following is not a composition of Nernst glower or Nernst filament ?

• Oxides of Zirconium

• Oxides of Barium

• Oxides of Yitrium

• Oxides of Thorium

What is the composition of Globar rod which is used as a source in Mid IR spectroscopy?

• Silicon carbide

• Silver chloride

• Silicon dioxide

• Silver carbide

Bolometer, a type of detector, is also known as

• Resistance temperature detector (RTD)

• Thermistor

• Thermocouple

• Golay cell

In a solid sample treatment technique, the finely ground solid sample is mixed with mineral oil to make a thick paste which is then spread between IR transmitting windows. What is the name of this solid sample treatment technique?

• Pressed pellet

• Mull technique

• Solid films

• Solids run in solution