Chemistry
Grade-10
Easy

Question

The incorrect statement among the following is

  1. Indicator is the substance which is used to identify the acids or bases.
  2. When a solution of sodium bicarbonate is added to the methyl orange, the color changes to green.
  3. Turmeric is an excellent natural indicator for identifying acidic and basic substances.
  4. When apple juice is mixed with phenolphthalein, the color of the solution remains the same.

hintHint:

Methyl orange shows red color in acidic medium and yellow color in basic medium.

The correct answer is: Turmeric is an excellent natural indicator for identifying acidic and basic substances.


    Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Methyl orange shows red color in acidic medium and yellow color in basic medium.
    A solution of sodium bicarbonate in water is basic turns Methyl orange into yellow.

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