write any two observations in an activity which may suggest that a chemical reaction has taken place. Give any example in support of your answer.

write any two observations in an activity which may suggest that a che

1.	write any two observations in an activity which may suggest that a chemical reaction has taken place. Give any example in support of your answer.
Answer» When a chemical reaction takes place, some or all these observations are observed... I) CHANGE in color Eg : reaction between lead nitrate and potassium iodide to give potassium nitrate and yellow PRECIPITATE of lead iodide. ie Pb(NO3) 2 + KI = PbI2 + KNO3 {Colorless}. {yellow} 2) evolution of gas Eg : the reaction between zinc and sulphuric acid to give zinc sulphate and hydrogen gas. Zn + H2SO4 = ZnSO4 + H2 Hope this helps... Plz MARK as brainliest..!