What is the nature of the reaction of potassium and water?

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Endothermic

Exothermic

Electron donating

Electron withdrawing

answer is B.

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Detailed Solution

Concept- Group 1 elements are highly reactive in nature. These elements are lithium, sodium , potassium, Rubidium and Cesium.
As metals like sodium and potassium are highly reactive, they react violently with water to produce hydrogen gas with huge amounts of energy. The amount of energy released is so high that these metals catch fire when they come in contact with moisture.
The reaction can be shown as-
Potassium reacts with water to form potassium hydroxide with the evolution of hydrogen.This reaction is highly exothermic. Thus, potassium reacts with cold water as-

Hence, the correct option is (2).

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