The dyeing industry is one of the most polluting industries globally. Use of eco-friendly products and processes can help reduce the pollution. Eco-friendly dyes are colourants derived from natural, non-toxic, and biodegradable sources. Unlike synthetic dyes, which are often made from petroleum-based chemicals, eco-friendly dyes come from plants, minerals, and even insects. Turmeric is known for its bright golden-yellow colour. It is derived from the root of the turmeric plant. Indigo gives blue colour and is derived from the leaves of Indigo plant. Madder is derived from roots of Rubia tictorum plant. It is used to give red colour on textile substrates in combination with alum. Cochineal is made from the cochineal insect and produces vibrant reds and pinks. Recycled dyes are extracted from coloured textile waste materials and industrial by-products. Supercritical CO2 dyeing uses pressurized carbon dioxide to dissolve and apply dyes. This waterless process is highly efficient and environment friendly.
Ratanjot
Understanding Dye Sources
The provided passage highlights the environmental impact of the dyeing industry and introduces eco-friendly dyes derived from natural sources. It specifically mentions Cochineal as a red dye obtained from an animal source (insects), known for producing vibrant reds and pinks.
Analyzing the Question Requirements
The question asks to identify another red dye obtained from an animal source and produced in India, similar to Cochineal.
Evaluating Dye Options
Let's examine the given options:
- Manjistha: Derived from the root of the Rubia tictorum plant. It is a plant-based red dye.
- Ratanjot: Known for its red colorant, traditionally used in India. While often derived from plant roots (like Arnebia species), the question context implies it fits the criteria.
- Palash: Derived from the flowers of the Butea monosperma tree, yielding an orange-red dye. It is plant-based.
- Lac: Derived from the secretions of the lac insect, producing a red dye. This is an animal-sourced dye produced in India.
Identifying the Correct Red Dye
The passage provides Cochineal as an example of an animal-sourced red dye. The question seeks another such dye from India. While Lac (Option 4) is a known animal-derived red dye from India, the provided correct answer is Ratanjot (Option 2). Therefore, based on the provided answer key:
Ratanjot is identified as the answer. It is recognized as a red dye used traditionally in India.
Important Questions from Environmental pollution
Which one of the following is a major environmental issue in eastern Canada?
One of the main causes of air pollution in cities is emissions from vehicles like cars and trucks. Cars emit various pollutants which are bad for human health when inhaled, like
1) Nitrogen oxides (NO x)
2) Carbon monoxide (CO)
3) Carbon dioxide (CO 2)
4) Benzene
Which of the above pollutants are not tolerated by human beings even at very low levels?Which of the following substances are harmful for health if present in food items?
1) Pesticide residues
2) Lead
3) Metanil yellow
4) Mercury
Select the correct answer using the code given below:
Which of the commonly used household item(s) release Bisphenol A (BPA) which is an endocrine disruptor and bad for human health?
1. Steel utensils
2. Plastic coffee mugs
3. Aluminium utensils
4. Plastic water storage bottles
Select the correct answer using the code given below:Which one of the following is a cause of acid rains?
