diff --git a/src/lab/exp6/Quizzes.html b/src/lab/exp6/Quizzes.html index d76a9b0..bcd6e73 100644 --- a/src/lab/exp6/Quizzes.html +++ b/src/lab/exp6/Quizzes.html @@ -24,6 +24,7 @@ + @@ -107,9 +108,8 @@

Instrumentation and Working Principles of Infra Re +

1. 1. The most commonly used and relatively less expensive cell for routine use in IR spectroscopy is:
a. Sodium chloride
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Instrumentation and Working Principles of Infra Re c. Glass Cells
d. Plastic Cells

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2. Materials made of glass are not used for IR measurement because:
a. strongly absorb through out the IR region of the spectrum.
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Instrumentation and Working Principles of Infra Re c. udergo scattering.
d. remains unaltered

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3. To measure the Spectrum of a compound in the range of 4000 to 400 cm-1 the following plates is used:
a. Glass plates
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Instrumentation and Working Principles of Infra Re c. Potassium bromide plates
d. Silica plates

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4. Which of the following bonds is expected to have the highest frequency stretch?
a. carbon-carbon single bond
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Instrumentation and Working Principles of Infra Re c. carbon-carbon triple bond
d. carbon-bromine single bond

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5. A strong signal at 3300 cm-1 in an IR spectrum indicates presence of
a. alcohol
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Instrumentation and Working Principles of Infra Re c. carbonyl
d. amine

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6. The carbonyl (C=O) stretching frequency appears at:
a. 740 - 720
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Instrumentation and Working Principles of Infra Re c. 3640 - 3250
d. 1160 - 1030

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7. Where in an IR spectrum does a carbon-carbon triple bond show a stretching vibration
a. 2700 cm-1
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Instrumentation and Working Principles of Infra Re c. 2100 cm-1
d. 3300 cm-1

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8. Infrared spectroscopy provides valuable information about
a. molecular weight
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Instrumentation and Working Principles of Infra Re c. chemical properties
d. functional groups.

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9. What determines the intensity of an IR peak absorption in an IR spectrum?
a. the change in polarizability during vibration
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Instrumentation and Working Principles of Infra Re c. the change in dipole moment during vibration
d. the molecular weight of the bonding atoms

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10. The most effect method of IR spectroscopy is the:
a. Dispersion spectrometers
b. Reflection spectrometers
c. Fourier-Transform spectrometers
d. Deflection spectrometers
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