NEET2002ChemistryHydrogenActual
Which of the following reaction produces hydrogen?
Options
- AMg + H ₂ O
- BH ₂ ~S ₄ O ₈+ H ₂ O
- CBaO ₂+ HCl
- DNa ₂ O ₂+2 HCl
Correct answer
A. Mg + H ₂ O
Step-by-step solution
Alkali and alkaline earth metals react with water to produce hydrogen gas and metal hydroxide. This is due to their high electropositive character. aligned & 2 Na +2 H ₂ O 2 NaOH + H ₂ & Mg +2 H ₂ O Mg ( OH )₂+ H ₂ aligned