Question

a black material ( tar) is heated for repairing a Room whether the change cause in tar by hearing can be reversed​

Answer 1

Answer:

yes

Explanation:

when a coal tar is heated it melts to form a thick dark liquid and again it solidifies by the process of cooling so this process can be reversed

Answer 2

Explanation:

when coal tar is heated it means it's melts a dark liquid the melting of coal tar is reversible change......