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Physical Properties of Metals

Which of the ...

Question

Which of the following element reacts violently when kept under water?

A

N a

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B

F e

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C

C u

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D

A u

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E

N e

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Solution

The correct option is D $N a$
Answer (A)
Sodium reacts violently with water to give $H_{2}$ gas
$2 N a + 2 H_{2} O \to 2 N a O H + H_{2}$

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