Railways General Science & Technology Acids, Bases and Salts / अम्ल, क्षार एवं लवण Sample Paper Acids and Bases Sample Test Paper-16

  • question_answer
    Study the following statements
    1. Litmus solution is a purple dye which is extracted from lichen and is commonly used as an indicator.
    2. Red cabbage leaves, turmeric, coloured petals of some flowers indicate the presence of acid or base in a solution.
    3. Some substances whose odour changes in acidic or basic medium are called olfactory indicators.
    Which of the statements given above are correct?

    A)  1, 2 and 3        

    B)  1 and 2

    C)  1 and 3

    D)  2 and 3

    Correct Answer: A

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