Answer:
(c),the copper roof turns green over time and (d) baking soda is dissolved in vinegar
Explanation:
the turning of a shiny copper roof to green is a chemical change involving the formation of a new product that is irreversible
the dissolution of baking soda in vinegar is an acid-base reaction involving the formation of carbonic acid and acetate followed by decomposition of carbonic acid to carbon(iv) oxide and water.it is an irreversible reaction invoving the formation of entirely new products.
