UV-Visible Spectroscopy Interview Questions and Answers | UV-Visible Spectroscopy MCQs
Questions
1
Solvatochromism is the ability of a substance to change colour due to
Answer:A change in the solvent polarity
2
Two compounds A and B have molar absorptivity as 1200 and 15,000 mol lit -1cm -1 respectively. Which of the following statements is correct regarding them?
Answer:Compound B can be detected at very low concentrations than compound A.
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3
Which of the following shows bathochromic shift in polar solvent
Answer:Ethylene
4
The colour of a substance perceived by human eye is
Answer:Not same as that the substance absorbs
6
Which of the following detector has fast response time
Answer:photo diode array
7
The light which reaches the detector without passing through the cell is known as
Answer:Stray radiation
8
A sample exhibited has an absorbance 1.0 in UV-Visble spectroscopy. the percentage transmittance will be
Answer:10%
9
In phototube, photo multiplier tube, the transmitted light from the cells produces photocurrent by falling on
Answer:Photocathode
10
The absorptivity of a standard sample of 1% w/v solution measured at a path length of 1 cm, A(1%, 1 cm), is 312 at 254 nm. The absorbance of the test sample was observed 0.624 at 254 nm. The concentration of test sample is
Answer:2mg/100 ml
