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Reaction with Water/ Steam

Which of the ...

Question

Which of the following reacts with cold water vigorously?

A

Carbon

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B

Sodium

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C

Magnesium

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D

Sulphur

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Solution

The correct option is B Sodium
Sodium is a light and soft metal that reacts vigorously with cold water. The reaction is so violent and exothermic that the evolved hydrogen gas immediately catches fire.

$2 N a + 2 H_{2} O \to 2 N a O H + H_{2}$

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