Question

9.
The following is a list of changes. Classify them as physical/chemical and reversible/irreversible.
a. burning of paper

b. ripening of a banana
c. baking of a cake
d. breaking of glass
e. converting of milk into paneer
f. boiling of an egg
g. burning of a candle
h. weathering of rock


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Answer 1

A. Chemical irreversible
B. Chemical irreversible
C.chemical irreversible
D. Physical irreversible
E.chemical irreversible
F. Physical irreversible
G. Chemical irreversible
H. Chemical irreversible

Hope this helps..

Answer 2

Answer:

a. burning of paper    = chemical irreversible

b. ripening of banana = physical & chemical irreversible

c. baking of cake        = physical & chemical irreversible

d. breaking of glass    = physical irreversible

e. converting of milk into paneer = chemical irreversible

f. boiling of an egg  = chemical irreversible

g. burning of candle = physical & chemical reversible ( physical because wax melts and chemical because Co2 formed during burning and reversible because the wax can again be made candle )

h. weathering of rock  = physical irreversible

#hope it  helped#

Have a great day ahead.