Which of the following are examples of chemical reactions?

i. Burning of wood

ii. Cutting of wood

iii. Conversion of steam to water

iv. Rusting of almirah

i, iv

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i, iii, v

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ii, iv, v

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v, ii, iii

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Solution

The correct option is A
i, iv

Burning of wood - Chemical change ‐ The chemical composition of wood changes.

Cutting of wood - Physical change - The chemical composition remains the same, only the size of the wood changes.

Conversion of steam to water- Physical change - No change in chemical nature of the substance.

Rusting of almirah- Chemical change ‐ Iron present in almirah forms ConversionIron oxide (new compound) due to the presence of moisture.

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Which of the following are examples of chemical reactions? i. Burning of wood ii. Cutting of wood iii. Conversion of steam to water iv. Rusting of almirah

Which of the following are examples of chemical reactions?

i. Burning of wood

ii. Cutting of wood

iii. Conversion of steam to water

iv. Rusting of almirah