Question

China rose indicator turns basic solution to?
A. Yellow
B. Orange
C. Magenta
D. Green

Answer 1

Hint: China rose is a natural indicator. Try to recall its colour change in acidic to basic solution to get an idea about the answer.

Complete step by step answer:

Indicators - Special types of substances are used to test whether a substance is acidic or basic. These substances are known as indicators.
Turmeric, litmus, china rose petals (Gudhal), etc., are some of the naturally occurring indicators.
The indicators change their colour when added to a solution containing an acidic or a basic substance.
How to use China rose as an indicator - Collect some China rose petals and place them in a beaker. Add some warm water and keep the mixture for some time till water becomes coloured. Use the coloured water as an indicator. Add a few drops of the indicator to each of the solutions.
Colour change in China rose indicator - A solution of china rose turns green in a basic solution, and magenta in an acidic solution.

Hence, the correct option is D.

Additional information: Acid - Curd, lemon juice, orange juice and vinegar taste sour because they contain acids. The chemical nature of such substances is acidic. The word acid comes from the Latin word “acere” which means sour.
Base - Baking soda is bitter in taste. It means that it has no acids in it. If you rub its solution between fingers, it feels soapy. Substances like these which are bitter in taste and feel soapy on touching are known as bases. The chemical nature of such substances is said to be basic.

Note: Litmus - The most commonly used natural indicator is litmus. It is extracted from lichens. It has a purple colour in distilled water.
When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. It is available in the form of a solution, or in the form of strips of paper, known as litmus paper. Generally, it is available as red and blue litmus paper.