Q. 64.1( 7 Votes )

i. What is observ

Answer :

i. When lead nitrate reacts with potassium iodide, it forms a yellow coloured precipitate of lead iodide along with potassium nitrate.

ii. This type of reaction is a double displacement reaction.

iii. [PbNO3]2 + 2KI 2KNO3 + PbI2


PbNO3 is lead nitrate.

KI is potassium iodide.

KNO3 is potassium nitrate.

PbI2 is lead iodide.


i. X is Cu.

Y is CuO.

ii. This a redox chemical reaction. Here, copper gets oxidised by heating to copper oxide, and hydrogen reduces copper oxide back to copper.

iii. Cu + O2 2CuO

CuO + H2 Cu + H2O

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i. What is observXam idea - Science