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

  • question_answer DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 1 Observe the flow chart given below and answer the questions that follow: \[\text{Magnesium+Oxygen}\xrightarrow{\text{heat}}\text{''A''}\xrightarrow{\text{Water}}\text{''B''}\xrightarrow[\text{solution}]{\text{Red litmus}}\text{''C''}\] "B" in this represents

    A) Magnesium                 

    B) Magnesium oxide

    C) Magnesium hydroxide

    D) None of these

    Correct Answer: C

    Solution :

    "B" is magnesium hydroxide \[\text{MgO+}{{\text{H}}_{\text{2}}}\text{O}\to \text{Mg(OH}{{\text{)}}_{\text{2}}}\]

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