Question

Litmus Is a natural dye obtained from

• A. Fling
• B. Virus
• C. Lichens
• D. Actinomycetes

Answer 1

The correct option is C

Lichens

The correct option is C.

Explanation of the correct option:

1. A blend of different natural colours obtained from lichens called litmus is water-soluble.
2. One of the earliest kinds of pH indicators, used to assess the acidity of materials, is frequently produced by its absorption onto filter paper.
3. Some commonly used lichens are Rocella and Lecanora.
4. The pH is a measure of the concentration of hydrogen ions and the acidity or alkalinity of a solution.
5. Indicators are substances that change their colour when they are added to acidic or alkaline solutions.
6. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used.

Explanation of incorrect options:

Option A:

1. It is not an appropriate option.

Option B:

1. An infectious agent known as a virus can only replicate inside of its host organism.
2. Numerous living things, including bacteria, plants, and animals, are susceptible to virus infection.
3. Viruses have a relatively straightforward structure and are so little that a microscope is required to see them.

Option D:

1. The unicellular filamentous bacteria known as the Actinomycetes generate spores and build a branching network of filaments.
2. They have long been acknowledged as the main causes of the unpleasant earthy-musty tastes and odours in water.

Final Answer: Litmus is a natural dye obtained from lichens.