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

  • question_answer 47) 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: \[\text{Magnesium+Oxygen}\xrightarrow{\text{heat}}\text{''A''}\xrightarrow{\text{Water}}\text{''B''}\xrightarrow[\text{solution}]{\text{Red litmus}}\text{''C''}\] "C" in it indicates that

    A) Red litmus when added to "B", no change in colour occurs.

    B) Red litmus when added to "B" changes to blue.

    C) Red litmus when added to "B" changes to green.

    D) Red litmus when added to "B" it gives a colorless solution

    Correct Answer: B

    Solution :

    "B" is magnesium hydroxide (basic in nature) when red litmus is added to it, it turns blue.

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