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

  • question_answer 56) DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 4 Indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, China rose petals (Gudhal), etc., are some naturally occurring indicators. Which of the following statements is correct?

    A) Colour of litmus changes from blue to red in an acidic solution.

    B) Colour of litmus changes from red to blue in an acidic solution.

    C) Colour of litmus changes from pink to colourless in an acidic solution.

    D) Colour of litmus changes from colourless to pink in a basic solution.

    Correct Answer: A

    Solution :

    Blue litmus changes to red in an acidic solution.

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