Aim: To study the burning of magnesium ribbon in air. Caution : It is necessary that this activity should be performed in the presence of a teacher. For safety purpose, teacher and student should wear goggles. Activity: Take approximately 3-4 cm long magnesium ribbon and make it clean by rubbing it with sand paper. Hold it with a pair of tongs and heat on the flame of burner or spirit lamp and the ash being formed collects in the watch-glass as shown in the figure 1.1. Collected ash in the watch-glass isof magnesium oxide. Burn the magnesium ribbon. Keeping it away as far as possible from your eyes. What is the composition of ash collected in watch-glass ?

Aim: To study the burning of magnesium ribbon in air. Caution : It is

1.	Aim: To study the burning of magnesium ribbon in air. Caution : It is necessary that this activity should be performed in the presence of a teacher. For safety purpose, teacher and student should wear goggles. Activity: Take approximately 3-4 cm long magnesium ribbon and make it clean by rubbing it with sand paper. Hold it with a pair of tongs and heat on the flame of burner or spirit lamp and the ash being formed collects in the watch-glass as shown in the figure 1.1. Collected ash in the watch-glass isof magnesium oxide. Burn the magnesium ribbon. Keeping it away as far as possible from your eyes. What is the composition of ash collected in watch-glass ?
Answer» Solution :WHITE ash collected in watch-glass is of magnesium oxide (MGO). Note : Due to `O_(2)` and `N_(2)` present in air, Mgo is formed as a major product, moreover traces of `Mg_(3)N_(2)` is ALSO OBTAINED.