Chemistry Questions and Answers March 01, 2020

The polar substance on polar adsorbent a) it certainly has a small migration distance b) it is most likely that it has a large migration distance c) it is most likely that it has a small migration distance if solvent with high elution strength is used as a mobile phase it is most likely that it has a small retardation factor if solvent with low

The performance of combustion equipment can be analysed by processing specific parameters such as combustion products (also known as exhaust, stack or flue gases), temperature (flue gas, air or fuel), mass flowrates (fuel or air) etc using the fundamental knowledge of combustion reaction as well as mass and energy calculations. It can be much

Gaseous fuel composition INPUT Fuel Mixture Methane Ethane Propane nButane Carbon dioxide Nitrogen Total Combustion Input Parameters Assuming complete combustion (only water and carbon dioxide formed) Percentage () of excess air Inlet fuel temperature is fixed at 25C Inlet air temperature (C) Flue gas temperature (C) (mo)

Which of the following solvents is the more polar a) acetone (E0.56) b) hexane (E 0.00) c) toluene (E 0.22) d) methanol (E 0.95) 3D

a1 In chromatography separated solutes are distributed between a) adsorbent and eluent b) sorbent and solvent, c) stationary and mobile phase d) all answers are cottect, e) there is no correct answer

Q.2. Introduction of the separated compounds into the chromatographic system is possible due to a) injection into column filled with adsorbent b) application onto special plate covered with adsorbent c) both answers are correct d) there is no correct answer

Q.7. Predict the order of elution (from the longest to the lowest migration distance) for the following compounds by normal phase (silica gel as the adsorbent) TLC technique. H2N Find which molecules isare able to form hydrogen bonds with silica gel.

"Spotting" refers to: a). An unwanted creation of Dalmatians during a chemical reaction; b). The application of a compound or mixture to a TLC plate using a micro capillary tube; c). The application of very small Dalmatians to a TLC plate using a microcapillary tube; d). An unwanted distribution of compounds on a TLC plate based on solubilities