7th Class Science Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank Acids Bases and Salts

  • question_answer
    The given figure shows the colour changes in test tubes I, II and III, when China rose indicator is added to them. The respective solutions in test tubes I, II and III are            

    A)
     Sugar solution Lime  water   Baking powder
                   

    B)
     Sugar solution Lemon juice Vinegar
                   

    C)
     Lime water Sugar solution Lemon juice
                   

    D)
     Lemon juice  Sugar solution Lime water

    Correct Answer: D

    Solution :

    China rose indicator turns magenta in acidic solution and green in basic solution. Therefore, test tube I contains an acidic solution (lemon Juice), test tube III contains basic solution (lime water). As test tube II shows no change in colour so, it contains a neutral solution (sugar solution).         


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