Answer:
C. 2&3 created a chemical change
Explanation:
See if the carbon atoms are SP2 or Sp they the coplanirty is more and if its Sp3 hybridization it cant be in coplanar as Sp3 is having Td shape where as sp2 and sp are not :)
I think that it's cannot include supernatural explanations, or C.
If i got it wrong sorry
The particles can move around each other because they do not have as strong bonds as solids do.
Answer:
Gas doesn't have a fixed volume because it has no weight on like water which has weight so volume will be present.