A studend gets fingerprints on a cuvette before using it to determine the concentration of a coloured species using its known extinction coefficient. What is the effect on the absorbance and reported concentration ?A. `{:("Absorbance",,"Reported concentration"),("Increased",,"too law"):}`B. `{:("Absorbance",,"Reported concentration"),("Increased",,"too high"):}`C. `{:("Absorbance",,"Reported concentration"),("decreased",,"too low"):}`D. `{:("Absorbance",,"Reported concentration"),("decreased",,"too high"):}`

A studend gets fingerprints on a cuvette before using it to determine

1.	A studend gets fingerprints on a cuvette before using it to determine the concentration of a coloured species using its known extinction coefficient. What is the effect on the absorbance and reported concentration ?A. `{:("Absorbance",,"Reported concentration"),("Increased",,"too law"):}`B. `{:("Absorbance",,"Reported concentration"),("Increased",,"too high"):}`C. `{:("Absorbance",,"Reported concentration"),("decreased",,"too low"):}`D. `{:("Absorbance",,"Reported concentration"),("decreased",,"too high"):}`
Answer» Correct Answer - b

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`0.80 g` of sample of impure potassium dichromate was dissolved in water and made up to `500 mL` solution. `25 mL` of this solution treated with excess of `KI` in acidic medium and `I_(2)` liberated required `24 mL` of a sodium thiosulphate solution. `30 mL` of this sodium thiosulphate solution required `15 mL` of `N//20` solution of pure potassium dichromate. What was the percentage of `K_(2)Cr_(2)O_(7)` in given sample?A. `73.5%`B. `75.3%`C. `36.75%`D. none of these
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