Home › Junior Science Olympiad › Chemistry › Acids Bases and Salts › A teacher calls litmus and turmeric natural indi…
A teacher calls litmus and turmeric natural indicators. Methyl orange is instead a:
ASynthetic indicator
BSecondary indicator
CSelective indicator
DSeasonal indicator
Answer & Solution
Correct answer: A. Synthetic indicator
1. Litmus and turmeric come from living sources.
2. Methyl orange and phenolphthalein are made in a laboratory.
3. So methyl orange is a synthetic indicator.
_Source: syllabus Science Class X, Chapter 2, Acids, Bases and Salts._
Related questions
A doctor sets a fractured arm with a white powder that hardens with water. It is:Blue copper sulphate crystals turn white on heating. The molecules driven off are:A bee sting leaves acid in the skin. Rubbing on baking soda helps because it is a mild:A dentist suggests a basic toothpaste after meals because it will:Tooth enamel begins to corrode once the pH inside the mouth falls below:Rain water is tested and its pH is below 5.6. This rainfall is called:A doctor notes the human body works only within a narrow pH range, roughly:Hydrochloric acid gives far more hydrogen ions than acetic acid at equal strength. So it i