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Importance of Water

Which of the ...

Question

Which of the following metal(s) will give same gas on reaction with cold or warm water?

A

N a

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B

M g

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C

A u

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D

F e

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Solution

The correct options are
A $N a$
B $M g$
$N a$ and $M g$ gives hydrogen gas on reaction with cold or warm water.
$2 N a + 2 H_{2} O \to 2 N a O H + H_{2} ↑$
$2 M g + 2 H_{2} O \to 2 M g O + H_{2} ↑$

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