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of the following is a concentration dependent GC detector? A) Flame Ionization B) Nitrogen-Phosphorus C)Flame Photomethic D) Photo-Tonization B) Hall Electrolytic Conductivity 10. Which of the following(3)is/are correct? 1. Doubling the column's length increases resolution by a factor of 1.41. II- In GC, solute molecules do not interact with mobile phase III- The purpose of split ratio in split injection mode is to control the amount of sample injected onto the column. A) I,II and III B) Only II C) Iand II D) Iand III E) II and III 11-Which of the following(s) is' are correct for liquid chromatography? 1- In a chromatography.Eluent is a solvent used to carry the components of a mixture through a stationary phase II- In Isocratic elution the composition of the mobile phase is changed continuously or in a series of steps. III-In a reversed -phase HPLC, the stationary phase is composed of hydrophobic packing material while in a normal -phase HPLC the stationary phase is composed of hydrophilic packing material. A) 1, II and III B) Iand II C) I and III D) II and III E) Only III 12-The molar absorptivity for the complex formed between bismuth (III) and thiourea 9.32times 10^3L/mol.cm at 470 nm. Calculate the molar concentration for the complex if the absorbance is 0.357 when the measurements are made in 3.00-cm cell. A) 1.60times 10^-5M B) 3.84times 10^-5M C) 4.71times 10^-5M D) 2.46times 10^-5M E) 1.28times 10^-5M

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of the following is a concentration dependent GC detector? A) Flame Ionization B) Nitrogen-Phosphorus C)Flame Photomethic D) Photo-Tonization B) Hall Electrolytic Conductivity 10. Which of the following(3)is/are correct? 1. Doubling the column's length increases resolution by a factor of 1.41. II- In GC, solute molecules do not interact with mobile phase III- The purpose of split ratio in split injection mode is to control the amount of sample injected onto the column. A) I,II and III B) Only II C) Iand II D) Iand III E) II and III 11-Which of the following(s) is' are correct for liquid chromatography? 1- In a chromatography.Eluent is a solvent used to carry the components of a mixture through a stationary phase II- In Isocratic elution the composition of the mobile phase is changed continuously or in a series of steps. III-In a reversed -phase HPLC, the stationary phase is composed of hydrophobic packing material while in a normal -phase HPLC the stationary phase is composed of hydrophilic packing material. A) 1, II and III B) Iand II C) I and III D) II and III E) Only III 12-The molar absorptivity for the complex formed between bismuth (III) and thiourea 9.32times 10^3L/mol.cm at 470 nm. Calculate the molar concentration for the complex if the absorbance is 0.357 when the measurements are made in 3.00-cm cell. A) 1.60times 10^-5M B) 3.84times 10^-5M C) 4.71times 10^-5M D) 2.46times 10^-5M E) 1.28times 10^-5M

of the following is a concentration dependent GC detector? A) Flame Ionization B) Nitrogen-Phosphorus C)Flame Photomethic D) Photo-Tonization B) Hall Electrolytic Conductivity 10. Which of the following(3)is/are correct? 1. Doubling the column's length increases resolution by a factor of 1.41. II- In GC, solute molecules do not interact with mobile phase III- The purpose of split ratio in split injection mode is to control the amount of sample injected onto the column. A) I,II and III B) Only II C) Iand II D) Iand III E) II and III 11-Which of the following(s) is' are correct for liquid chromatography? 1- In a chromatography.Eluent is a solvent used to carry the components of a mixture through a stationary phase II- In Isocratic elution the composition of the mobile phase is changed continuously or in a series of steps. III-In a reversed -phase HPLC, the stationary phase is composed of hydrophobic packing material while in a normal -phase HPLC the stationary phase is composed of hydrophilic packing material. A) 1, II and III B) Iand II C) I and III D) II and III E) Only III 12-The molar absorptivity for the complex formed between bismuth (III) and thiourea 9.32times 10^3L/mol.cm at 470 nm. Calculate the molar concentration for the complex if the absorbance is 0.357 when the measurements are made in 3.00-cm cell. A) 1.60times 10^-5M B) 3.84times 10^-5M C) 4.71times 10^-5M D) 2.46times 10^-5M E) 1.28times 10^-5M

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1. The correct answer is B) Nitrogen-Phosphorus.<br /><br />2. The correct answer is D) I and III.<br /><br />3. The correct answer is C) I and III.<br /><br />4. The correct answer is B) $3.84\times 10^{-5}M$.
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