Phenolphthalein is pink in an aqueous solution having a ph of

Between the range of pH 8.2 - 10

Explanation:

Phenolphthalein is colourless and turns pink in an alkaline medium with between the pH of 8.2 - 10.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the correct answer would be d. hope this !