Which of the following can be used to measure the decrease in concentration of aqueous reactants over time?
A
Paper chromatography.
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B
Spectroscopy.
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C
Pressure differences.
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D
Reduced turbidity.
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Solution
The correct option is A Paper chromatography. Paper chromatography-Paper chromatography is an analytical method used to separate colored chemicals or substances. It is primarily used as a teaching tool, having been replaced by other chromatography methods.