Class 12 Chemistry · Chapter 13 · Test 2
UV and IR Spectroscopy
44 MCQs
44 questions · 35 min · 44 marks
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Sample questions
The first 5 of 44. Try each one, then tap to see the answer.
Question 1
In UV-Vis spectroscopy what is measured when light is passed through the sample?
- ATransmittance of light
- BMass of the sample
- CTemperature
- DVolume
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Answer: A
The absorbance is then found from the transmittance.
Question 2
Absorbance (A) is related to transmittance (T) by:
- AA = log T
- BA = -log T
- CA = 1/T
- DA = T^2
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Answer: B
A = -log(T).
Question 3
A sample has a transmittance of 0.10. What is its absorbance?
- A-1.0
- B0.10
- C1.0
- D10
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Answer: C
A = -log(0.10) = 1.0.
Question 4
A sample has a transmittance of 0.010. What is its absorbance?
- A0.010
- B1.0
- C10
- D2.0
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Answer: D
A = -log(0.010) = 2.0.
Question 5
What is the wavelength range used in UV-Vis spectroscopy?
- A100 nm to 500 nm
- B200 nm to 800 nm
- C300 nm to 1000 nm
- D400 nm to 1600 nm
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Answer: B
The text states that UV-Vis spectroscopy uses 200-800 nm.
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