Chemistry
Grade-10
Easy
Question
A sample solution is present in the container (X). A filter paper is dipped inside this solution and then the lime solution. After dipping in the lime water, the color of the filter paper changes to reddish-brown. What will be the sample solution present in container (X)?
- Methyl orange solution.
- A baking soda solution
- A turmeric solution.
- Blue litmus solution.
Hint:
A turmeric solution
The correct answer is: A turmeric solution.
It contains curcumin, a chemical that changes colour with pH. When a substance is basic, its colour is red; when a substance is acidic, its colour changes from yellow to brown. Because lime water is calcium hydroxide, which is basic in nature, turmeric will turn red when mixed with it.
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