The sign of a chemical reaction has occurred is a piece of metal is placed in water and produces sparks and gas. The correct option is B.
What is a chemical reaction?
Chemical changes, often known as chemical reactions, are the transformation of one or more compounds into one or more brand-new, separate substances. In other words, a chemical change is a process based on atomic rearrangement.
Metal is malleable and luster substance. They are gold, silver, magnesium, etc. They are present in the periodic table. Furthermore, they are highly reactive and soft.
A chemical reaction is happening in the reaction of water when it produces a spark or gas when reacting with another substance.
Thus, the correct option is B. A piece of metal is placed in water and produces sparks and gas.
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