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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Q. Which of the following is not an advantage of gas-solid chromatography?

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Q. The distribution coefficients of Gas-solid chromatography are greater than that of Gas-liquid chromatography.

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Q. Which of the following columns can be used in Gas-solid chromatography?

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Q. Which of the following is not an advantage for the conversion of packed columns into wide bore capillaries?

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Q. Which of the following is not a disadvantage of gas-solid chromatography?

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Q. Gas-solid chromatography can be used only for separation of certain low molecular weight gaseous species.

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Q. Which of the following is a special adsorbent used in gas-solid chromatography?

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Q. Which of the following properties of molecular sieves make it ideal for exclusion mechanism of separation?

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Q. Which of the following is the disadvantage of reciprocating pump used in liquid chromatography?

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Q. Which of the following is not a disadvantage of Pneumatic pumps used in liquid chromatography?

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Q. Which of the following is not a desired characteristic of pulse dampers or flow smootheners used in liquid chromatography?

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Q. Which of the following will improve the efficiency of the separation process in liquid chromatography?

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Q. Which of the following are the practical problems that arise due to the decrease in column diameter?

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