i) Change in colour
Cu(*) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag.
The solution will become blue in colour and shining silver metal will be deposited
ii) Change in temperature.
NaOH + HCl → NaCl + H2O + Heat.
The temperature will increase because heat is evolved.
iii) Formation of precipitate.
Pb(NO3)2(aq) + 2KI(aq) → PbI2(*) + 2KNO3(aq)
Yellow PPt
Yellow precipitate of Phi, will he formed.
