Which of the following statement/s is true regarding Increasing the flow rate of the mobile phase?. Choose the correct statement/s: 1. increase longitudinal diffusion and decrease broadening brought about by factor B in the van Deemter equation. II. increase broadening due to mass transfer. III. Increase broadening due to multiple paths. IV. Decrease longitudinal diffusion and decrease broadening brought about by factor B in the van Deemter equation Select one: O a. land II O b. Il and III O c. Il and IV O d. Iand III O e. III and IV

Chemistry
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Answer the two MCQs
Which of the following statement/s is true regarding Increasing the flow rate of the mobile phase?. Choose the
correct statement/s:
I. increase longitudinal diffusion and decrease broadening brought about by factor B in the van Deemter equation.
II. increase broadening due to mass transfer.
III. Increase broadening due to multiple paths.
IV. Decrease longitudinal diffusion and decrease broadening brought about by factor Bin the van Deemter equation
Select one:
O a. Iand II
O b. Il and II
O c. Il and IV
O d. land III
e. III and lV
Transcribed Image Text:Which of the following statement/s is true regarding Increasing the flow rate of the mobile phase?. Choose the correct statement/s: I. increase longitudinal diffusion and decrease broadening brought about by factor B in the van Deemter equation. II. increase broadening due to mass transfer. III. Increase broadening due to multiple paths. IV. Decrease longitudinal diffusion and decrease broadening brought about by factor Bin the van Deemter equation Select one: O a. Iand II O b. Il and II O c. Il and IV O d. land III e. III and lV
In the Instrumental method of analysis, the statement "The validity of a chemical analysis ultimately depends on
measuring the response of the analytical procedure to known standards" is best explained as:
I before an analytical procedure is used for the determination of an unknown sample, its response must be tested with
a known quantity of analyte.
II.A calibration curve showing the relation between instrumental signal and concentration of standards is plotted first
and then used to find the concentration of the unknown sample
III before an analytical procedure is used for the determination of a standard sample, its response must be tested with
a known quantity of analyte.
IV The signal of an analye in a pure form is measured by the instrumental method and used as a calibration standard
Choose the correct statement/s
O a. I, II
O b. I, II, III, IV
O c. II, III, IV
O d. 1,11, III
O e. I, II, IV
Transcribed Image Text:In the Instrumental method of analysis, the statement "The validity of a chemical analysis ultimately depends on measuring the response of the analytical procedure to known standards" is best explained as: I before an analytical procedure is used for the determination of an unknown sample, its response must be tested with a known quantity of analyte. II.A calibration curve showing the relation between instrumental signal and concentration of standards is plotted first and then used to find the concentration of the unknown sample III before an analytical procedure is used for the determination of a standard sample, its response must be tested with a known quantity of analyte. IV The signal of an analye in a pure form is measured by the instrumental method and used as a calibration standard Choose the correct statement/s O a. I, II O b. I, II, III, IV O c. II, III, IV O d. 1,11, III O e. I, II, IV
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