Subject :Chemistry Class : Class 6
Case Study :
Most of the physical changes are temporary
and reversible. However, there are few exceptions
like sharpening a pencil. Evaporation and boiling
both are examples of physical changes and both the
processes are reversible also.
Which of the given changes is not reversible while burning of a candle?
A Melting of solid wax.
B Liquid wax changes into vapours.
C Wax vapour burns into flame.
D All of these.
I attempted C but it is showing that I attempted D.