Question

please help me
this is urgent​

Answer 1

Answer:

1 ,5 ,6,8 ,9 are reversible and rest all are irreversible changes

Answer 2

Answer:

Points :-

¤ reversible change = physical change.

¤ irreversible change = chemical change .

Q ) when chemical change or irreversible change happens ?

==> it happens when :-

• New substances are formed .
• when heat is out .

__________________________________

Answer :-

1) Physical or reversible change .

2) chemical or irreversible change .

3) physical or reversible change ( no new substances are formed )

4) chemical or irreversible change .

5) physical change or reversible change .

6) Physical or reversible change.

7) Chemical or irreversible change .

8) Physical or reversible change .

9) Physical or reversible change .

10) Physical or reversible change .