Which of the following is a natural indicator?

Practice MCQ for SSC, UPSC, RRB Exams

A. Phenolphthalein A.
B. Litmus B.
C. Methyl orange C.
D. Bromothymol blue D.

Correct Answer: B সঠিক উত্তর: B

Explanation ব্যাখ্যা

Examples of natural indicators include litmus, turmeric, and red cabbage. These indicators change color depending on whether they are in an acidic or basic solution.
Litmus: This is the most commonly used natural indicator, extracted from lichens. It turns red in acidic solutions and blue in basic solutions.
Turmeric: This spice also acts as a natural indicator, changing color from yellow to orange or red depending on the acidity.
Red cabbage: The juice of red cabbage can also be used to determine acidity or basicity.

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