I wish to express my gratitude to the principle xyz ,_________ school for encouragement for all the facilities provided to me for this project . i extent my hearty thanks to mrs xyz , chemistry teachers who supported me and guided me to a succesful completetion of  my project .i cant forget to offer my scincere thanks to my parents and classmates to helped to carry out this project succesfully by giving various ideas and advice which i recieved time to time.....