7th Class Science Acids, Bases and Salts Question Bank Acids, Bases and Salts

  • question_answer 40) Identify the only base which does not have a metal in its molecule.

    A)  \[NaOH\] (Sodium hydroxide)

    B) \[N{{H}_{4}}OH\](Ammonium hydroxide)

    C) \[Mg{{(OH)}_{2}}\] (Magnesium hydroxide)

    D) \[Ca{{(OH)}_{2}}\]  (Calcium hydroxide)

    Correct Answer: B

    Solution :

    Ammonium hydroxide \[(N{{H}_{4}}OH)\] is the only commonly used base (alkali) which does not have a metal in its molecule. Instead, it has ammonium \[(N{{H}_{4}})\] radical in it.

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