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

  • question_answer Metallic oxides dissolve in water to form

    A) acidic solution            

    B) neutral solution

    C) basic solution              

    D) None of these

    Correct Answer: C

    Solution :

    e.g., \[\begin{align}   & \text{Sodium oxide +Water}\xrightarrow{{}} \\  & \begin{matrix}    \,\,\,\,\,\,N{{a}_{2}}O & \,\,\,\,\,\,\,\,\,\,\,\,+{{H}_{2}}O  \\ \end{matrix} \\ \end{align}\]\[\begin{align}   & \text{Sodium hydroxide }\left( \text{base} \right) \\  & \text{            (2NaOH)} \\ \end{align}\]


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