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

  • question_answer 119) DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.
    Type of Litmus X Y Z
    Red litmus turns blue no change no change
    Blue litmus no litmus turns red no change
    Which of the following could be the substance Z?

    A)  \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]                     

    B)  \[\text{HN}{{\text{O}}_{\text{3}}}\]

    C)  \[\text{KOH}\]                       

    D)  \[{{\text{H}}_{\text{2}}}\text{O}\]

    Correct Answer: D

    Solution :

     \[{{\text{H}}_{\text{2}}}\text{O}\]

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