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Per NCERT §6.14, the SOLUBILITY of a sparingly soluble salt in the presence of a COMMON ION (e.g. AgCl in NaCl solution) does what compared to pure water?
AIncreases
BStays the same
CBecomes infinite
DDecreases
Answer & Solution
Correct answer: D. Decreases
NCERT §6.14: common-ion effect — added Cl⁻ shifts AgCl ⇌ Ag⁺ + Cl⁻ left, reducing solubility. Used in gravimetric analysis.
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