List of top Pharmaceutical Analysis Questions on Chromatography and Its Principles asked in GPAT

High molecular mass determined by which chromatographic technique:
WHO recommends the use of Chromatographic techniques in herbal medicine for
Which of the following is not true for Eddy diffusion in chromatography?
A chromatogram of a peak provided a retention time at 5,4 minutes and 0.41 base width of the peak. The number of plates or the peak obtained is:
The principle of gas-liquid chromatography is _____.
The difficulties of long clution time and poor resolution of complex mixtures are observed in clution analysis. These difficulties can be overcome by modification of elution analysis, known as:-

Separating techniques such as gas chromatography and liquid chromatography are not appropriate for separation of amino acids. Select correct reason from the following 

Which of the following techniques is not useful to detect polymorphs
One of the principle upon which HPLC detector functions is
Which of the following dienes can undergo Diels-Alder reaction most readily
What is the main different between HPLC and UPLC