Which among the following are natural indicators? (a)Turmeric and Phenolphthalein (b) Litmus and hydrochloric acid (c) China rose solution and baking powder (d) Litmus and china rose solution
Answers
Required Answer:
- Litmus and china rose ,both are natural indicators.
Explanation:
First of all, let us understand what exactly indicators means!
❒ Indicators are those substances that are used to recognize whether the substance is acidic or basic in nature.
❒ Indicators change their colour on coming in contact with the substance we want to test.
❒ Natural Indicators :
☛ Made from the substances found in our nature like leaf, flowers etc.
☛ Examples : Litmus, china rose, turmeric.
❒ Synthetic Indicators :
☛ Made from dyes in laboratories and factories.
☛ Examples : Phenolphthalein, Methyl orange.
Now from these information , let us verify our answer!
Option A ( Turmeric and Phenolphthalein )
→ According to the question, we have to select the option that must have both natural indicators.
• Here, turmeric is a natural indicator as it is obtained from nature.
• But phenolphthalein is a synthetic indicator.
Thus, this option is wrong.
Option B ( Litmus and hydrochloric acid )
→ Here,
• Litmus is a natural indicator because it is obtained from lichens present in biome.
• But HCL is an acid not an indicator. So, it is neither a natural indicator nor a synthetic indicator.
Thus, this option is wrong.
Option C ( China rose solution and baking powder)
→ Here,
• China rose is a natural indicator as it is obtained from nature.
• But baking powder isn't an indicator, it is a base. So, it is neither a natural indicator nor a synthetic indicator.
Thus, this option is wrong.
Option D(Litmus and china rose solution )
→ Both litmus and china rose (hibiscus) solution are indictors as litmus is extracted from lichens present in our nature and china rose from hibiscus plant.
Thus, this option is correct. ✔
Litmus and China Rose is The Natural Indicators.