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The molar mass of a reference substance A is 500 g/mol, and it is used to calibrate the B solution of 0.1 mol/L. The calibration reaction is set as: A+2B==P, and the weighing quantity of the reference substance is ( )

A. 0.1 ~ 0.2 g
B. 0.2-0.5 g
C. 0.5 ~ 1.0 g
D. 1.0 ~ 1.6 g

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In order to maintain a good linear relationship between the fluorescence intensity of the solution and the concentration of the solution, you should:

A. Keep the absorbance of the solution less than 0.05
B. Keep the light transmittance of the solution greater than 0.5
C. Use monochromatic light as excitation light
D. Use cuvettes with longer optical path

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To prepare 1000 mL 0.1 mol/L HCl solution, the volume of concentrated hydrochloric acid (12 mol/L) should be ( ).

A. 0.84 mL
B. 8.4 mL
C. 1.2 mL
D. 12 mL

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Which of the following processes does not affect the non-radiative relaxation process of excited-state molecules?

A. Vibrational relaxation
B. Internal conversion
C. Quench
D. Aggregation

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Which of the following factors generally does not affect the fluorescence spectrum of a solution?

A. Excitation wavelength
B. pH
C. Solvent
D. Concentration

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The molar mass of a reference substance A is 500 g/mol, and it is used to calibrate the B solution of 0.1 mol/L. The calibration reaction is set as: A+2B==P, and the weighing quantity of the reference substance is ( )

A. 0.1 ~ 0.2 g B. 0.2-0.5 g C. 0.5 ~ 1.0 g D. 1.0 ~ 1.6 g

In order to maintain a good linear relationship between the fluorescence intensity of the solution and the concentration of the solution, you should:

To prepare 1000 mL 0.1 mol/L HCl solution, the volume of concentrated hydrochloric acid (12 mol/L) should be ( ).

Which of the following processes does not affect the non-radiative relaxation process of excited-state molecules?

Which of the following factors generally does not affect the fluorescence spectrum of a solution?

A. 0.1 ~ 0.2 g
B. 0.2-0.5 g
C. 0.5 ~ 1.0 g
D. 1.0 ~ 1.6 g