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Question
Burning of wood and rusting of iron bar are examples of ________ changes.
Burning of wood and rusting of iron bar are examples of ________ changes.
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Solution
The correct option is D chemical
When we burn wood a new substance called ash is formed. Also, during rusting of iron a brown flaky layer of iron oxide is formed on the iron surface. So, there is a colour change along with formation of a new substance. Such types of changes where there is formation of a new substance are called chemical changes. Chemical changes are permanent in nature. Also, the given changes are non-periodic in nature.
When we burn wood a new substance called ash is formed. Also, during rusting of iron a brown flaky layer of iron oxide is formed on the iron surface. So, there is a colour change along with formation of a new substance. Such types of changes where there is formation of a new substance are called chemical changes. Chemical changes are permanent in nature. Also, the given changes are non-periodic in nature.
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