List of top Forensic Science Questions on Applications of various chromatographic techniques

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A gas stream, the so-called carrier gas, is fed into the column at a constant rate.
Reason (R): The carrier gas is chemically inert and is generally nitrogen or helium.
In the light of the above statements, choose the most appropriate answer from the options given below :

Arrange the following band-broadening contributions in LC (Liquid Chromatography) from those most reduced by decreasing particle size to those least affected. A. Eddy diffusion
B. Longitudinal diffusion
C. Mass transfer resistance
Choose the correct answer from the options given below :

Arrange the following components of a high performance liquid chromatography (HPLC) instrument in the correct order of the mobile phase flow path. A. Pumping system
B. Injection valve
C. Detector
D. Column
Choose the correct answer from the options given below :

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): High Performance Liquid Chromatography (HPLC) is a very useful technique for separating non-volatile or thermally fragile species.
Reason (R): The stationary phase in HPLC is a liquid, which protects the sample from high temperatures.
In the light of the above statements, choose the most appropriate answer from the options given below :

In HPLC, when the packing material used in the column is polar in nature and the mobile phase is relatively non-polar, it is known as: