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Which of the following is the ratio of a length of column packing to retention time?

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Which of the following is the ratio of a length of column packing to retention time?

(a) Average linear rate of solute migration

(b) Average linear rate of mobile migration

(c) Relative migration rate

(d) Selectivity factor

The question was asked in an interview for internship.

I need to ask this question from Chromatographic Behaviour of Solutes in section Chromatography of Analytical Instrumentation

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Correct choice is (a) Average linear rate of solute migration

Explanation: Average linear rate of solute migration is the ratio of a length of column packing to retention time. It influences the effectiveness of the column in separating solutes.

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