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NEET2018ChemistryHydrogenActual

Assertion : Oxidation state of hydrogen is +1 in H ₂ O while -1 in CaH ₂ . Reason : CaH ₂ is a metal hydride and for hydrides, hydrogen is assigned the oxidation number of -1 .

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

Oxidation number of elements in their compounds or ions is obtained using some rules e.g., hydrogen is assigned oxidation number of +1 in general and -1 for metal hydrides.

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