Q. Which of the following is the disadvantage of coiled or helical shaped packed chromatographic column?

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Q. Capillary columns are open tubular columns constructed from which of the following materials?

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Q. Sample injection port must be maintained at a temperature at which rapid vapourisation occurs but thermal degradation does not occur.

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Q. Which of the following is not a desirable feature of the ovens used in gas chromatography?

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Q. Which of the following is not an ideal characteristic of a detector used in gas chromatography?

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Q. Which of the following is not a type of detector used in gas chromatography?

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Q. Which of the following detectors have high sensitivity to all organic compounds?

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Q. Which of the following is not the advantage of thermal conductivity detector used in gas chromatography?

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Q. Which of the following detectors is widely used to detect environmental samples like chlorinated pesticides and polychlorinated biphenyls?

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Q. In which of the following detector is the eluent mixed with hydrogen and burned and then mixed with ozone and its intensity is measured?

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Q. Filter photometer detector is primarily responsive to which of the following compounds/elements?

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Q. Which of the following detector uses ultraviolet radiation from lamps to produce ionisation of solute molecules?

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Q. Flame ionisation detector is also known as Katharometer.

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Q. Thermionic emission detector used in gas chromatography is most sensitive to which of the following elements?

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Q. Which of the following detectors has a non-volatile bead of rubidium silicate placed above the flame tip?

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Q. In which of the following detectors, the carrier gas is excited by a radioactive source and the atoms of carrier gas are excited to a metastable state?

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Q. Which of the following is not used as a heating element in a Thermal conductivity detector?

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Q. Electron capture detector is much less susceptible to contamination when nickel is used instead of tritium.

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Q. Gas-solid chromatography is based on which of the following processes?

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Q. Which of the following components cannot be retained by gas-liquid columns but can be separated by using gas-solid chromatography?

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