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

  • question_answer
    Which one of the following can be used as an acid-base indicator by a visually impaired student?

    A)  Litmus 

    B)  Vanilla essence

    C)  Turmeric          

    D)  Petunia leaves

    Correct Answer: B

    Solution :

    [b] Vanilla can be used as an Olfactory indicator Olfactory indicators change their odour in acidic or basic media.

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