If you pour a few drops of petrol on your palm, you will feel cool as it evaporates. What type of reaction is this?

Endothermic reaction

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Exothermic reaction

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Chemical reaction

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Slow reaction

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Solution

The correct option is A Endothermic reaction
When petrol comes in contact with our skin, it takes up heat energy from our palm to change from liquid state to vapour state.Thus it is an endothermic process. The temperature of the palm is lowered which causes a cooling sensation. This is an example of cooling effect on evaporation.

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