Question

Give one word for the following:
The colour shown by a neutral substance on a pH scale.

Answer 1

Hint: pH scale is an indicator that shows different colours according to the acidic and basic character of the substance. The colour for acidity, basicity and neutrality is different due to which we can easily identify the acidic or basic level of a substance.

Complete step by step answer:
Indicators are the substances that give a visible sign generally a colour change of the presence of a substance such as an acid or a base in any solution.
There are different kinds of chemical indicators. Some are natural indicators like:
 Turmeric: changes to red when any soap(base) is applied to the surface having turmeric.
Some are man-made indicators like methyl orange, methyl blue, phenolphthalein and pH paper litmus paper.
PH stands for potential of hydrogen as it is actually the measure of the concentration of hydrogen ions in a substance.
pH scale in chemistry is used to define the acidity or basicity of the aqueous solution. Acidic solution tends to have lower pH and basic solution has higher pH. pH scale ranges from ${\text{0 - 14}}$.

The pH of ${\text{7}}$ is for neutral solutions. The pH less than ${\text{7}}$ is for acidic solutions and the pH more than ${\text{7}}$ is for basic solutions.
The PH less than ${\text{3}}$ defines strong acid. The pH ${\text{3 - 6}}$ shows weak acid. The pH of ${\text{7}}$ is for neutral solutions that show green colour. The PH from ${\text{8 - 14}}$ is for weak alkali and shows blue colour.
The colour shown by the neutral substances on pH scale is GREEN. So, that’s the one word for the asked question.

Note:
The standard colour for neutral substances is green and the more acidic substances then the colour moves towards red while more basic is the solution the colour will be blue.