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in-the-colorimetric-determination-of-ambient-so-2-by-west-gaeke-method-the-absorbance-of-the-colored-complex

In the colorimetric determination of ambient SO2 by WEST-GAEKE method, the absorbance of the colored complex should be measured at which of the following wavelengths ?

[A] 550 nm

[B] 650 nm

[C] 450 nm

[D] 350 nm

Answer & Explanation
Answer: 550 nm

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