Question

The incorrect statement(s) among the following is/are:

a. the spots of colorless compounds in tlc can be detected by putting the plate under infrared light.
b. carbohydrate is detected by spraying the plate with ninhydrin solution.
c. chromatography paper contains water trapped in it, which acts as the stationary phase

Answer 1

Ninhydrin solution is not used for detecting carbohydrates; iodine and Benedict's solutions are used instead. Chromatography paper contains water acting as the stationary phase, aiding in the separation of compounds.

Step-by-step explanation:

In reference to the incorrect statements about carbohydrates and chromatography, carbohydrates are detected by using iodine solution or Benedict's solution, not ninhydrin solution. Ninhydrin is typically used to detect amino acids and proteins. When it comes to chromatography, the paper actually contains water trapped within it, which acts as the stationary phase. The trapped water interacts with the sample when a mixture is applied to the paper and different components move at different rates when a solvent (mobile phase) passes over the stationary phase, leading to the separation of components.

Chemical Digestion of Carbohydrates

In the digestive system, carbohydrates are partially chemically digested by enzymes such as amylase, which breaks down starch into simpler sugars like maltose.