When does phenolphthalein turn pink? in the presence of a base in the presence of an acid when it is in a neutral solution when it is reacting with a metal

Answer : in the presence of a base

Explanation:

Phenophthalein is an acid base indicator which changes it's color. It turns pink when exposed to the pH of 8.2 that is basic in nature. It may turn purple when exposed to higher pH values. The color change occurs due to change in charge and shape of the phenophthalein molecules.  It remains colorless in acidic solutions. Therefore, it can be useful for detection of basic solutions.

the answer is (A) in the presence of a base

Explanation:

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.