Question

Name the indicator which can give us an idea of how strong or weak and acid or base is.

Answer 1

In the given question we have to explain how the acid or base can be recognized using an indicator. an indicator is an ingredient which changes color in different pH environments or conditions. According to color change, one can easily recognize the compound is acidic or basic.

Complete answer:
A universal indicator shows different colors at different concentrations of ions of hydrogen that is $pH$ and shows how strong an acid or base is.

Universal indicator is a solution of brown color which contains a mixture of indicators that might be added to any substance to determine its $pH$. Like all other indicators, universal indicators change color in different $pH$ environments. Though at low $pH$ it seems red, and at high $pH$, it appears blue or violet. At neutral$pH$, it occurs green. Although It is used to find knowledge of how acidic or basic a substance might be. So, the $pH$ value starts from range 1-14 to indicate whether the solution has acidity, basicity or alkalinity within it.

Hence, a universal indicator will indicate whether the compound is a strong acid or a strong base.

Note: it works When we add an acid or base solution to the universal indicator, it forms a new color which is used to detect the $pH$ value of the acid or the base solution by matching the color through the colors on chart of $pH$ color.