A) Burning of coal does not produce a new substance.
B) Rust is hydrated \[\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{\text{3}}}\text{.}\]
C) The fizz that comes out when a soda bottle is opened is due to a chemical change.
D) Respiration is a physical process.
Correct Answer: B
Solution :
Chemical formula of rust is \[\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{\text{3}}}\text{.x}{{\text{H}}_{\text{2}}}\text{O}\]
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