alleryWhen a metal reacts with water, which gas is released?
AHydrogen
BOxygen
CNitrogen
DChlorine
Answer & Solution
Correct answer: A. Hydrogen
1. Metals react with water to form a metal hydroxide (or oxide) plus a gas.
2. The gas liberated in such reactions is hydrogen.
3. For example, sodium with water gives sodium hydroxide and hydrogen gas.
_Source: RRB Group D CEN-02/2018 PYQ, Q.11._
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