WBCS.LIVE practice question
What happens when the potassium iodide solution is added to a solution of lead nitrate?
Solve this multiple-choice question and check the correct answer with its explanation below.
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Correct answer and explanation
Correct answer: Yellow precipitation of lead iodide is formed.
Explanation: Potassium iodide reacts with lead nitrate to form a yellow precipitate of lead iodide. 📚 Other Information: ▪️ Reaction: Pb(NO₃)₂ + 2KI → PbI₂ (yellow ppt) + 2KNO₃. ▪️ This is a double displacement reaction. ▪️ It is also an example of precipitation reaction. ▪️ Lead iodide’s yellow precipitate is insoluble in cold water. ▪️ It dissolves in hot water, re-precipitating on cooling. ▪️ This property is used in chemistry demonstrations. ▪️ Nitrates (like KNO₃) remain soluble in water. ▪️ It’s an example of ionic compound reactivity.