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1- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps 2- In capillary columns the stationary phase is: (a) packed in the capillary. (b) coated inside the capillary. (d) isocratic liquid (c) gradient liquid. 3- The strongest functional group in anionic ion exchange chromatography is: a) carboxylic acid group b) sulphonic acid group d) quaternary amine c) primary amine 4- In gas chromatography, the best detector for quantification and identification of organic compounds is a) Elourescence b) UV-Vis c) Diode-array d) Mass-spectrometer 5- deionization of water from anions and cations in the industrial field can be carried by: a) SEC b) HPLC c) IEC d) recrystallization 6- is used for low concentration samples injection in GC. a) injection mode b) spilit mode c) spilitless mode d) reverse phase mode 7- The most common carrier gases in GC are a) Ne. H₂. He b) H2, CH4. Ne c) N₂. He. Ar. d) He. N₂. Xe

1- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps 2- In capillary columns the stationary phase is: (a) packed in the capillary. (b) coated inside the capillary. (d) isocratic liquid (c) gradient liquid. 3- The strongest functional group in anionic ion exchange chromatography is: a) carboxylic acid group b) sulphonic acid group d) quaternary amine c) primary amine 4- In gas chromatography, the best detector for quantification and identification of organic compounds is a) Elourescence b) UV-Vis c) Diode-array d) Mass-spectrometer 5- deionization of water from anions and cations in the industrial field can be carried by: a) SEC b) HPLC c) IEC d) recrystallization 6- is used for low concentration samples injection in GC. a) injection mode b) spilit mode c) spilitless mode d) reverse phase mode 7- The most common carrier gases in GC are a) Ne. H₂. He b) H2, CH4. Ne c) N₂. He. Ar. d) He. N₂. Xe

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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of the ion : 8- The trend of ions separation in the IEC depends on the d) adsorption a) size b) charge c) polarity 9- Capillary columns are sometimes preferred in gas chromatography over packed columns because they: (a) Are easier to prepare in the laboratory. (b) Prevent detector overloading. (c) Permit easier injection. (d) Have higher resolving power 10- Which is the most suitable technique to separate the following three ions from one another: Fluoride (F-), Nitrate (NO3), and Phosphate (PO4³-)? a) IEC b) SEC c) NP-HPLC d) GC e) RP-HPLC 11- Which one of the followings is the universal detector used in GC ? a) Fluorescence b) IR c) FID d) ECD 12- The column is heated in G.C to: A. prevent analyte condensation within the column B. control elution rate D. all of the above mentioned C. reduce band broadening to get sharper peaks 13- Which of the following detectors is widely used to detect environmental samples like chlorinated pesticides and polychlorinated biphenyls? A. Flame ionization detector B. Thermal conductivity detector C. Argon ionization detector D. Electron capture detector 14. In GC, the retention of the analytes is depend upon: A. The column type B.The type of detector used C. The analyte size and charge D. The boiling point and polarity of analyte 15. In this chromatographic technique, there is no binding or interaction of analyte (sample) with stationary phase, what is this technique? A. SEC B. GC C. HPLC D. IEC 16. In this chromatographic technique the mobile should consists of buffer solution or with known high ionic strength A. GC-MS B. RP-HPLC C. IEC D. NP-HPLC
Transcribed Image Text:of the ion : 8- The trend of ions separation in the IEC depends on the d) adsorption a) size b) charge c) polarity 9- Capillary columns are sometimes preferred in gas chromatography over packed columns because they: (a) Are easier to prepare in the laboratory. (b) Prevent detector overloading. (c) Permit easier injection. (d) Have higher resolving power 10- Which is the most suitable technique to separate the following three ions from one another: Fluoride (F-), Nitrate (NO3), and Phosphate (PO4³-)? a) IEC b) SEC c) NP-HPLC d) GC e) RP-HPLC 11- Which one of the followings is the universal detector used in GC ? a) Fluorescence b) IR c) FID d) ECD 12- The column is heated in G.C to: A. prevent analyte condensation within the column B. control elution rate D. all of the above mentioned C. reduce band broadening to get sharper peaks 13- Which of the following detectors is widely used to detect environmental samples like chlorinated pesticides and polychlorinated biphenyls? A. Flame ionization detector B. Thermal conductivity detector C. Argon ionization detector D. Electron capture detector 14. In GC, the retention of the analytes is depend upon: A. The column type B.The type of detector used C. The analyte size and charge D. The boiling point and polarity of analyte 15. In this chromatographic technique, there is no binding or interaction of analyte (sample) with stationary phase, what is this technique? A. SEC B. GC C. HPLC D. IEC 16. In this chromatographic technique the mobile should consists of buffer solution or with known high ionic strength A. GC-MS B. RP-HPLC C. IEC D. NP-HPLC
1- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps 2- In capillary columns the stationary phase is: (a) packed in the capillary. (b) coated inside the capillary. (d) isocratic liquid (c) gradient liquid. 3- The strongest functional group in anionic ion exchange chromatography is: a) carboxylic acid group b) sulphonic acid group c) primary amine d) quaternary amine 4- In gas chromatography, the best detector for quantification and identification of organic compounds is a) Flourescence b) UV-Vis c) Diode-array d) Mass-spectrometer 5- deionization of water from anions and cations in the industrial field can be carried by: a) SEC b) HPLC c) IEC d) recrystallization 6- is used for low concentration samples injection in GC. a) injection mode b) spilit mode c) spilitless mode d) reverse phase mode 7- The most common carrier gases in GC are a) Ne, H2, He b) H2, CH4, Ne c) N2, He, At d) He, N2, Xe
Transcribed Image Text:1- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps 2- In capillary columns the stationary phase is: (a) packed in the capillary. (b) coated inside the capillary. (d) isocratic liquid (c) gradient liquid. 3- The strongest functional group in anionic ion exchange chromatography is: a) carboxylic acid group b) sulphonic acid group c) primary amine d) quaternary amine 4- In gas chromatography, the best detector for quantification and identification of organic compounds is a) Flourescence b) UV-Vis c) Diode-array d) Mass-spectrometer 5- deionization of water from anions and cations in the industrial field can be carried by: a) SEC b) HPLC c) IEC d) recrystallization 6- is used for low concentration samples injection in GC. a) injection mode b) spilit mode c) spilitless mode d) reverse phase mode 7- The most common carrier gases in GC are a) Ne, H2, He b) H2, CH4, Ne c) N2, He, At d) He, N2, Xe
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