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UV-Visible Spectroscopy Objective Questions and Answers | UV-Visible Spectroscopy MCQs

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Free download in PDF UV-Visible Spectroscopy Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) Which of the following spectroscopy techniques is associated with molecular emission?
[A] UV-Visible spectroscopy
[B] IR spectroscopy
[C] Fluorescence spectroscopy
[D] X-ray diffraction
Answer: Fluorescence spectroscopy
(2) The primary band in aromatic compounds are observed at
[A] 241
[B] 215
[C] 255
[D] 184
Answer: 184

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(3) Select the groups that produces bathochromic shift when substituted on benzene.

[A] Q,R
[B] P,S
[C] P only
[D] P,Q,R and S
Answer: P,Q,R and S
(4) Diffraction gratings work on the basis of
[A] Max-Well Boltzman’s equation
[B] Bragg’s equation
[C] Noise-whitney equation
[D] Beer’s law
Answer: Bragg’s equation
(5) Select INCORRECT statement related to the following data.

Ee=Energy required for electronic transition

Ev=Energy required for Vibrational transition

Er=Energy required for rotational transition

[A] E e > E v > E r
[B] E e=100 * E v
[C] E e=10000 * E r
[D] E r=100* E v
Answer: E e=100 * E v
(6) Dark current in photo multiplier tube is
[A] The current produced by falling light on cathode
[B] The current produced by falling light on anode
[C] The residual current due to spontaneous discharge of dynodes
[D] The residual current that appears after the removal of incident light
Answer: The residual current due to spontaneous discharge of dynodes
(7) The mid IR region is
[A] 400-800 nm
[B] 25 μm-2.5 μm
[C] 4000-400 cm-1
[D] 2.5 μm – 1mm
Answer: 4000-400 cm-1
(8) Choose the wave number corresponding to 25 μm
[A] 2500 cm -1
[B] 4000 cm-1
[C] 250 cm -1
[D] 400 cm -1
Answer: 400 cm -1
(9) During relaxation, the electron spin is reversed in
[A] Fluorescence
[B] Phosphorescence
[C] IR
[D] NMR
Answer: Phosphorescence
(10) Which of the following is a real limitation to Beer’s law
[A] Fluorescence
[B] Analyte Dissociation
[C] Polychromatic radiation is used as source
[D] Analyte at high concentrations
Answer: Analyte at high concentrations

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