Which of the following metals will not give hydrogen gas while reacting with water?

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Copper

Magnesium

Zinc

Sodium

answer is D.

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Detailed Solution

Copper will not give hydrogen gas when reacting with water.
Metal reactivity series is a list of metals that are arranged in their decreasing order of reactivity. Metals that are placed below hydrogen in the reactive series will not give hydrogen gas on reacting with water. The decreasing order of reactivity of metals is Na > Mg > Zn > Cu.

Copper is placed below hydrogen in the reactivity series therefore it will not give hydrogen on reacting with metals.

Reaction with other metals can be shown as follows:
$2 Na + {2 H}_{2} O \to 2 NaOH + H_{2}$
$2 Mg + 4 H_{2} O \to 2 Mg (OH)_{2} + 2 H_{2}$
$2 Zn + {4 H}_{2} O \to 2 Zn (OH)_{2} + {2 H}_{2}$