Question

give an eg of change in temperature and change in colour and state and also make that equation balanced

Answer 1

change in state - NH3(g) + HCl(g) = NH4Cl(s)
change in temp. - CaO + H2O = Ca(OH)^2 + heat
change in colour - when citric acid reacts with purple potassium permangante then the solution become colourless
3KMnO4 + C6H807 = 3HMnO4 + C6H5K3O7

Answer 2

Change Temperature:
   CaO + H₂O → Ca(OH)₂ + Heat

Change of Colour:
  2KI + Pb(NO₃)₂ → 2KNO₃ + PbI₂

Change of State:
   Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq) 


:) Hope this Helps !!!