Ad 21. (a) Describe and explain what happens when magnesium burns in a jar of carbon(IV) oxide. Give the equation of the reaction. (b) Describe and explain what happens when carbon(IV) oxide is passed into lime water for a long time. What happens when the final product is heated? Give the equations of the reactions taking place.
(c) Which properties of carbon(IV) oxide account for its use in (i) fire extinguisher? (ii) refrigeration of fruits?
(d) Describe the composition of baking powder and explain the part it plays in the baking industry e