Q13. What is observed when a solution of potassium iodide is added to lead nitrate solution
What type of reaction is this? Write a balanced chemical equation for this reaction.
Q14. Distinguish between an exothermic and an endothermic reaction.
Q15. Distinguish between a displacement and a double displacement reaction.
Q16. Identify the type of reaction in the following:
Fe + Cuso.(aq) = FeSO.(aq) + Cu(s)
2H, + O2 = 24,0
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Answer. (1) When potassium iodide is added to the aqueous solution of lead nitrate then a yellow colured precipitate of Lead iodide is observed. (2) This reaction is a double displacement reaction. (3) 2KI + Pb(NO3)2 -----> PbI2 + 2KNO3.
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