MHT CET 2026 Chemistry question
Not in JEE Main or NEET syllabus
What is the result when soap is used in hard water?
Answer: (B)
Solution
Hard water contains and ions. Soap is the sodium salt of a long-chain fatty acid (e.g. sodium stearate); the metal ions react with it to form insoluble calcium/magnesium salts: C_{17}H_{35}COO^-Na^+$}
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