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MCQ on Atomic spectroscopy: Page-5

The sodium gives yellow color at 589.3 nm in flame. The wavelength of radiation for the atomic absorption of sodium will be

(A) 767 nm

(B) 629,3 nm

(C) 549.3 nm

(D) 589.3 nm

Which of the following is an example of anionic interference in atomic emission spectroscopy?

(A) Interference of high concentration of sodium ions in assay calcium ions.

(B) Interference by formation of less volatile salt with sulphates by calcium.

(C) Increased viscosity of the analyte solution by sugars.

(D) Decreased drop size of the analyte solution by alcohols.

Atomic absorption spectra produce narrow brand with peaks generally called as lines because it involves

(A) Electronic transition only

(B) Vibrational transitions only

(C) Rotational transitions only

(D) All of the three transitions

The range of temperatures attainable by acetylene-air mixture is

(A) 2550-2700

(B) 2000-2100

(C) 3050-3150

(D) 2100-2400

In atomic emission spectroscopy the graph drawn between

(A) Emission vs. Concentration

(B) Absorbance Vs Concentration

(C) Absorbance Vs wave length

(D) Emission Vs wave length