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

physical

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chemical

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physical and chemical

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biological

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Solution

The correct option is B
chemical

A chemical change is any change that results in the formation of a new substance. It involves making or breaking of bonds between atoms. When we burn wood, ash is formed (new substance). Rusting of iron results in the formation of ferric oxide. The properties of these substances change after the reaction. Therefore, burning of wood and rusting of the iron bar are examples of chemical reactions.

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Similar questions

Which of the following are physical changes and which are chemical changes?

(a) Burning of a magnesium wire

(b) Freezing of water

(d) Glowing of an electric bulb

H_{2} O,

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

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