Write the chemical equation of the reaction in which the following changes have taken place : (i) Change in colour (ii) Change in temperature Formation of precipitate.

Write the chemical equation of the reaction in which the following cha

1.	Write the chemical equation of the reaction in which the following changes have taken place : (i) Change in colour (ii) Change in temperature Formation of precipitate.
Answer» Solution :Chemical equations corresponding to different changes are given below : (i) Change in colour `Fe+underset("BLUE")(CuSO_(4))tounderset("GREEN")(FeSO_(4))+Cu` (ii) Change in temperature `underset("CALCIUM OXIDE")(CaO)+H_(2)O to underset("Hydroxide")underset("Calcium")(Ca(OH)_(2))+"HEAT"` (iii) Formation of precipitate `BaCl_(2)+Na_(2)SO_(4) to underset("White ppt.")(BaSO_(4))+2NaCl`