Correct Option
The correct option is A is false but R is true.
Explanation
Soap is chemically defined as the salt of a fatty acid, produced through a process called saponification, which involves the reaction of fats or oils with an alkali. While modern commercial soap bars became prominent in the 19th and 20th centuries, the chemical knowledge and use of soap-like cleansing agents existed in ancient civilizations, including India.
Statement-wise Analysis
- Assertion (A): Incorrect. The claim that the use of soap is a strictly modern invention introduced solely by Europeans in the 19th century is historically inaccurate. While the modern industrial manufacturing of soap bars was influenced by European methods during the colonial era, the fundamental concept of using saponified substances for cleansing was known and practiced in ancient India long before the 19th century.
- Reason (R): Correct. Ancient Indian texts contain references to soap-like substances. Specifically, texts such as those by Chakrapani Datta (circa 11th century AD) describe formulations involving the mixture of mustard oil and alkalies (often derived from plant ashes) to create cleansing agents. This confirms that the chemical basis of soap-making (saponification) was understood in ancient India.
Key Takeaway
Saponification (the reaction of oil with alkali) was known in ancient India, as evidenced by texts describing the use of mustard oil and plant-based alkalies for washing, disproving the notion that soap is exclusively a modern European introduction.