CBSE Class 10 Science 2019 · Paper 31/4/1 · Question 8(b)

Chemical Reactions and Equations 3 marks Medium

When potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Answer

Yellow lead iodide, $PbI_{2}$ , precipitates; the reaction is both a double displacement reaction and a precipitation reaction.

(a) The precipitate is yellow; it is lead iodide,

PbI_{2}

. (b)

Pb (NO_{3})_{2} (aq) + 2 KI (aq) \to PbI_{2} (s) + 2 KNO_{3} (aq)

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