Q: Which one of the following statements about the cleansing action of soap is not true?
(a)The oil and dirt gets collected in the centre of the micelle.
(b)Soap micelles scatter light.
(c)Soaps are ammonium salts of long chain carboxylic acids.
(d)Soap forms insoluble precipitates with the calcium and magnesium ions in hard water.
Correct Answer: (c)
The correct answer is (d) 'साबुन कठोर जल में कैल्शियम और मैग्नीशियम आयनों के साथ अविलेय अवक्षेप बनाता है।'. This question from the General Studies domain tests knowledge of Miscellaneous.