CHM1025C
Module One: Sample Exam Homework
Part D: Chemical/Physical/Nuclear Change 5 points
State whether each of the following is a physical change, a chemical change,
or a nuclear change:
__________________1. Electricity
decomposes water.
__________________ 2. Methanol
dissolves in gasoline
__________________ 3. Dry ice pellets
disappear
__________________ 4. Iron oxidizes to
rust
__________________ 5. Bromine vaporizes
into a reddish-brown gas
__________________ 6. Uranium-235
splits into two small elements when bombarded
with neutrons in an atomic bomb.
___________________7. Copper conducts
heat
___________________8. Baking soda
fizzes in vinegar
___________________9. Grinding sugar
crystals into a powder
__________________10. Sodium reacts
with chlorine gas
__________________11. Adding air to a
tire
__________________12. Slicing an orange
into wedges
__________________13. Hydrogen atoms
fuse into helium atoms in a hydrogen bomb
__________________14.” Dry ice”(Solid Carbon dioxide) vaporizes into a gas at room
temperature and sea level pressure
__________________15. Natural Gas burs with a blue flame