A drop of water is poured over a white powdery substance. Then it is o

1.	A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions : (i) What is the white powdery substance? (ii) Why does the substance change to blue colour? (iii) Write the chemical formula of the blue substance . (iv) Is the blue substance an acidic salt or a basic salt? (v) Give a reason for your answer in (iv).
Answer» _{A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions :} _{(i) What is the white powdery substance?} _{(ii) Why does the substance change to blue colour?} _{(iii) Write the chemical formula of the blue substance .} _{(iv) Is the blue substance an acidic salt or a basic salt?} _{(v) Give a reason for your answer in (iv).}

A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions : (i) What is the white powdery substance? (ii) Why does the substance change to blue colour? (iii) Write the chemical formula of the blue substance . (iv) Is the blue substance an acidic salt or a basic salt? (v) Give a reason for your answer in (iv).

Answer»

_{A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions :}

_{(i) What is the white powdery substance?}

_{(ii) Why does the substance change to blue colour?}

_{(iii) Write the chemical formula of the blue substance .}

_{(iv) Is the blue substance an acidic salt or a basic salt?}

_{(v) Give a reason for your answer in (iv).}