Question

1) Change in state is ………………change.
2) How carbonic acid is formed?
3) Why should a magnesium ribbon be cleaned before burning in air?
4) Give the chemical reaction for displacement reaction.
5) What is photo decomposition reaction?
6) CaCO3(s)
⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗ ………… + ………….
7) How will you determine whether a chemical reaction has taken place or not?
8) What is rusting?​

Answer 1

Answer:

7) color change

smoke omitting

chemical reaction is taking place

8) rusting is common term for corrosion of iron

1)phase change.