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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
Hydrogen gas is not widely used as a reducing agent because :
  • A
    Hydrogen decomposes to atomic hydrogen at higher temperature.
  • B
    Risk of explosion with water.
  • C
    Hydrogen isomerises to ortho hydrogen at higher temperature.
  • ✓
    Many metals form hydrides at lower temperatures.
✓

Answer

Correct option: D.
Many metals form hydrides at lower temperatures.
Hydrogen is actually commonly used as both reducing and oxidising agent. Its reducing properties can be used with $\ce{Pt}$ or $\ce{Pd}$ to reduce alkyne and alkene.

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