Question

Which of these changes is

an example of a physical
change?
A. sodium creates an
explosion when added
to water
B. an indicator
changes color when it
is added to an acid
C. dry ice changes
into a gas when
heated
D. paper turns black
and creates smoke
when heated with a
flame
NO
2
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Answer 1

C. dry ice changes

into a gas when

heated

Step-by-step explanation:

A is a chmical reaction creating sodium hydroxide

B chemical reaction

C Physical change....it is still CO2

D Chemical reaction