Q. Which of the following conditions will cause the efficiency of the column to increase?

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Q. Which of the following is the expression for Eddy diffusion in the column, if ‘γ’ represents obstruction factor, ‘dₚ’ represents particle diameter, ‘Dₘ’ represents Solute diffusion co-efficient and ‘λ’ represents function for packing uniformity?

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Q. Which of the following is the expression for longitudinal diffusion in the column, if ‘γ’ represents obstruction factor, ‘dₘ’ represents particle diameter, ‘Dₘ’ represents Solute diffusion co-efficient and ‘λ’ represents function for packing uniformity?

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Q. In gas-liquid chromatography, when films are used in the interior of the capillary column, then what is the value of Eddy diffusion?

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Q. For an unpacked coated capillary column, the obstruction factor takes which of the following values?

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Q. Base line resolution is achieved when degree of resolution/separation is ______

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Q. Which of the following equations give the expression for plate number, N when ‘tR’ is the adjusted retention time and ‘Wb’ is the width at the base of the peak which is equal to 4 standard deviations.

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Q. It is more difficult to measure the width at half peak height than the base width in the detector output.

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Q. The solute, while moving in the column is always in equilibrium with both the stationary phase and the mobile phase.

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Q. For the separation of which of the following substances, Gas-solid chromatography is being used?

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

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Q. Which of the following is the disadvantage of hydrogen, which can be used as carrier gas in gas chromatography?

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Q. Which of the following is the disadvantage of helium, which can be used as carrier gas in gas chromatography?

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Q. Which of the following is the disadvantage of nitrogen, which can be used as carrier gas in gas chromatography?

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Q. Slow injection of large samples leads to band broadening and loss of resolution.

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Q. In which of the following methods are liquid samples injected into the column in gas chromatography?

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Q. What must be done to the solid samples for it to be introduced into the column without using solid injection syringes in gas chromatography?

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Q. Which of the following is the commonly used support material for the packed column in gas chromatography?

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Q. Which of the following is the advantage of a straight packed column?

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

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