JEE Main & Advanced Chemistry Hydrogen & Its Compounds Question Bank Hydrogen

  • question_answer The hydride ion \[{{H}^{-}}\] is a stronger base than its hydroxide ion \[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in water [CBSE PMT 1997]

    A) \[{{H}^{-}}(aq)+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}(aq)\]

    B) \[{{H}^{-}}(aq)+{{H}_{2}}O(l)\to O{{H}^{-}}(aq)+{{H}_{2}}(g)\]

    C) \[{{H}^{-}}(aq)+{{H}_{2}}O(l)\to \text{No reaction}\]

    D) None of these

    Correct Answer: B

    Solution :

    \[\underset{\text{base 1}}{\mathop{{{H}^{-}}(aq)}}\,+\underset{\text{acid 2}}{\mathop{{{H}_{2}}O(l)}}\,\to \underset{\text{base 2}}{\mathop{O{{H}^{-}}(aq)}}\,+\underset{\text{acid 1}}{\mathop{{{H}_{2}}(g)}}\,\]


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