Question

Which one of the following processes results in the formation of a new chemical compound?

• A. Burning phosphorus in air
• B. Heating silver wire to ${100}^{o}C$
• C. Dissolving common salt in water
• D. Melting ice

Answer 1

The correct option is A Burning phosphorus in air

Melting ice, heating silver, dissolving salt in water are all physical process in which only the phase will change whereas burning of phosphorus is a chemical change during which the chemical composition of reactant is altered and a new product is formed.

Hence, option $A$ is correct.