Question

Urgent guys plz help

Answer 1

1) in chemical change new product is formed.
& chemical change take place.

2) MgoH2 is aqueous , & strong Salt

3) burning needs o2 while rusting need Air & water both

4) burning of wood is non covential form of energy.
while glow in bulb may be covential energy (solar cells)

5) Magnesium ribbion burn with spark.