Burning of wood and rusting of iron bar are examples of ________ changes.

physical

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chemical

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temporary

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periodic

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Solution

The correct option is B 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.

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Similar questions

Burning of wood and rusting of the iron bar are examples of ___________ reaction.

Which of the following are the examples of a chemical reaction?

i. Burning of wood

ii. Cutting of wood

iii. Conversion of steam to water

iv. Rusting of almirah

Write the difference between :

a) burning of magnesium ribbon and burning of candle.

b) Rusting of iron and burning.

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