Answer Happy

instrumental analysis 2
Q.2 Choose the correct answer from the following? 1- Smarks. I each In all chromatographie separations the sample is transported in a mobile phase, which may be a. a gas, or a supercritical fluid. c. a gas, a liquid, or a supercritical fluid. b. a gas, a solid, or a supercritical fluid. d. a gas, or a liquid 2. 2- a. If the components strongly retained by the stationary phase then it will move slowly with the flow of mobile phase and clute later b. move fast with the flow of mobile phase and clute later move fast with the flow of mobile phase and elute early d. move slowly with the flow of mobile phase and elute early C. 3- The equilibrium constant, Ke for chromatography reaction is called the a. distribution constant, b. the partition ratio c. the partition coefficient d. All are correct 4- In GC the sample size can be........ a. 1-20 mL packed column and 109 mL capillary column b. 1-20 ul packed column and 103 L capillary column c. 1-20 uL capillary column and 109 ul packed column d. All are correct 5- The Split injection in the gas chromatography is................ a. all sample to column only for trace analysis, low (sample) risk of backflash b. for samples that decompose above boiling point no heated injection port routine method 0.1-1 % sample to column remainder to waste d. All are correct c.