Question

What are indicators. what are its different types. For class 10th

Answer 1

Chemical indicators are typically colorless when contained in a bottle by itself, but when the indicator is added to a solution, the pH of that solution can make it express a color. It helps determine the pH of a solution, much like pH test strips; chemical indicators can, however, be added to a solution before an acid or base is added and when the solution changes color, you know you’ve added enough of the extra base/acid to reach the desired pH.

NATURAL INDICATOR

An indicator prepared from natural substances is known as natural indicator. Examples are Litmus, Turmeric, China rose petals, snowball plant, Red Cabbage and Grape Juice… .For example, red cabbage juice and tea pigments show different colors when the pH is different. The color of tea darkens in a basic solution, but the color becomes lighter when lemon juice is put into a tea. Red cabbage juice turns blue in a basic solution, but it shows a distinct red color in an acidic solution.

SYNTHETIC INDICATOR

An indicator prepared from artificial substances is known as synthetic indicator Examples are Phenolphthalein and Methyl Orange.

Answer 2

Answer:There are two types of indicator. They are:-

Explanation:1. Natural Indicators-

These are prepared naturally. For example, Litmus, China rose, Turmeric

2. Synthetic Indicators-

These are prepared artificially in laboratories or factories. For example, Methyl orange, Phenolphthalein.

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