In which of the following compounds does hydrogen exhibit an oxidation state of

Practice Questions

Q1
In which of the following compounds does hydrogen exhibit an oxidation state of -1?
  1. H2O
  2. HCl
  3. NaH
  4. H2O2

Questions & Step-by-Step Solutions

In which of the following compounds does hydrogen exhibit an oxidation state of -1?
  • Step 1: Understand what oxidation state means. It is the charge of an atom in a compound.
  • Step 2: Know that hydrogen usually has an oxidation state of +1, but it can be -1 in certain compounds.
  • Step 3: Identify the compounds given in the question. We are looking for where hydrogen is -1.
  • Step 4: Look at NaH (sodium hydride). Sodium (Na) has an oxidation state of +1.
  • Step 5: Since the compound is neutral, the total oxidation states must equal 0. Therefore, hydrogen must be -1 to balance the +1 from sodium.
  • Step 6: Conclude that in NaH, hydrogen exhibits an oxidation state of -1.
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