Question
Which of the following is an example of chemical reaction?
Answer: Option B
:
B
Rusting of iron is a chemical reaction. When iron rusts, it reacts with oxygen present in water or moisture in the air to create a new compound called iron (III) oxide.
Fe(s) + O2(g)→Fe2O3.xH2O(s)
Fe2O3.xH2O is commonly known as rust and has properties entirely different from that of iron or oxygen.
Other options involve either change in physical state or size.
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:
B
Rusting of iron is a chemical reaction. When iron rusts, it reacts with oxygen present in water or moisture in the air to create a new compound called iron (III) oxide.
Fe(s) + O2(g)→Fe2O3.xH2O(s)
Fe2O3.xH2O is commonly known as rust and has properties entirely different from that of iron or oxygen.
Other options involve either change in physical state or size.
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