Final answer:
pH can be used as a similar standard to temperature to assess the amount of p-nitrophenol produced.
Step-by-step explanation:
A similar standard to temperature that can be used to assess the amount of p-nitrophenol produced would be pH. The reaction between p-nitrophenol and sodium hydroxide produces a yellow anion, and the intensity of the yellow color is directly proportional to the amount of p-nitrophenol produced. Similarly, the pH of a solution changes with the concentration of p-nitrophenol, as the reaction consumes acid and produces a basic product.