which of these vanilla onion and clove is an olfactory element?/and why
meaning of clove

Jessica James, 8 years ago

Grade:10

8 Answers

Aarti Gupta

askIITians Faculty 300 Points

8 years ago

An Olfactory indicator is defined as a substance whose smell varies when it is mixed with an acidic or basic solution.Such substances can be used in the laboratory to test whether a solution is a base or an acid, and this process is called olfactory titration. All onion,clove oil and vanilla extract are examples.
An olfactory indicator works on the principle that when an acid or base is added to it,then different odour can be detected in bases whereas odour remains same in acids.Certain substances changes odour in acidic or basic medium.
1.Onion:- Paste or juice of onion loses its smell when added with base.It does not change its smell with acid.
2.Vanilla:- The smell of vanilla vanishes with base,but it’s smell does not vanishes with an acid.
3.Clove oil- In bases its characteristis smell cannot be detected.
Dear student kindly ask the second part of your question clearly so that you can get an satisfactory answer.

Jessica James

51 Points

8 years ago

thanku maam

Aarti Gupta

askIITians Faculty 300 Points

8 years ago

Your welcome dear student.Keep asking the questions.

Aditya

11 Points

7 years ago

All substances odour changes in bases media in the given example.Acids do not change any substance odour in these particular examples?

Sss

11 Points

6 years ago

Clove is an eatable which is used in fried rice ,biryani, etc... to add essence or smell .Also used to clean our teeth ,cure cold, clove or its oil are very bitter in taste but are good for health.

Avinash Naik

19 Points

6 years ago

Olfactory are certain substances whose odour changes in acidic or basic medium.Ex. Onion Vanala Extract

Priya Thomas

15 Points

4 years ago

Olfactory indicators: "sense of smell"

Those substances whose smell or odour changes in acidic or basic solutions

are called olfactory indicators.

Eg: Onion extract, vanilla extract, clove oil

Onion has a characteristic pungent smell

Onion extract + base ➡️onion smell cannot be detected

Onion extract + acid ➡️does not destroy the smell of the onion

Vanilla extract has a sweet smell

Vanilla extract + base ➡️ cannot detect the smell of vanilla extract

Vanilla extract + acid ➡️ can detect the smell of vanilla extract

Clove oil has a sweet-spicy, hot smell with fruity top notes

Clove oil + base ➡️smell of clove oil cannot be detected

Clove oil + acid ➡️smell of clove oil can be detected

Rishi Sharma

askIITians Faculty 646 Points

3 years ago

Hello Jessica,
Olfactory indicator is defined as a substance whose smell varies when it is mixed with an acidic or basic solution.Such substances can be used in the laboratory to test whether a solution is a base or an acid, and this process is called olfactory titration. All onion,clove oil and vanilla extract are examples.
An olfactory indicator works on the principle that when an acid or base is added to it,then different odour can be detected in bases whereas odour remains same in acids.Certain substances changes odour in acidic or basic medium.
1.Onion:- Paste or juice of onion loses its smell when added with base.It does not change its smell with acid.
2.Vanilla:- The smell of vanilla vanishes with base,but it’s smell does not vanishes with an acid.
3.Clove oil- In bases its characteristis smell cannot be detected.
Thanks
I hope above content clear your concept.
All the best for your exams.