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Gas Chromatography

Gas Chromatography
Which of the following is not used for detection in GC?

NMR
Infrared spectroscopy
Flame ionisation
Electrical conductivity

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Gas Chromatography
Doubling the column's length increases resolution by a factor of

(2)0.5
2
4
3

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Gas Chromatography
What are the benefits of decreasing the column internal diameter?

Increased resolution
Reduced risk of column overloading
All of these
Increased sample capacity

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Gas Chromatography
The column is heated to

control elution of the different analytes
reduce band broadening to get sharper peaks
prevent analyte condensation within the column
all of these

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Gas Chromatography
The GC trace obtained after an experiment is called a

chromatogram
graph
chromatophore
chromatograph

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Gas Chromatography
Derivatisation of a sample is carried out to

All of these
reduce polarity of the analytes
increase the detector response
increase volatility of the analytes

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