Question

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

(a) Plate number becomes greater, plate height becomes smaller

(b) Plate number becomes smaller, plate height becomes smaller

(c) Plate number becomes greater, plate height becomes larger

(d) Plate number becomes greater, plate height becomes larger

The question was asked in my homework.

My enquiry is from Column Efficiency and Column Resolution topic in portion Chromatography of Analytical Instrumentation

Answer 1

The correct answer is (a) Plate number becomes greater, plate height becomes smaller

For explanation I would say: The efficiency of the column increases when the plate number becomes greater and the plate height becomes smaller. Column efficiency greatly depends on plate height and plate number.