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

  • question_answer 77) You dissolved a sample, in distilled water and then added a drop of this solution to a test-tube containing blue litmus solution which changes to red. It shows that the sample given to you is of:

    A) soap                            

    B) tomato juice

    C) baking soda                

    D) sugar

    Correct Answer: B

    Solution :

    Since the blue litmus changes to red, the sample is acidic in nature. Both soap and baking soda are basic whereas sugar is neutral.

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