Answer
409.8k+ views
Hint: In chemistry, flame test as an analytical method to find out if certain elements are present in the sample or not. These elements are alkali metals and alkaline earth metals. The elements are mainly present as metal cations.
Complete answer:
> Each element has a characteristic colour. When the chemical composition of each sample is introduced in the flame test there are changes in the colour of the flame. This change in colour helps us to find out which element is present in the given sample.
> When a metal cation is heated in a flame, it results in the excitation of electrons from lower energy level to higher energy level by absorbing the energy in the form of heat. To return to the ground state, the electrons in the excited state emit the visible light.
> Potassium belongs to the alkali metals and present in the Group I of the periodic table. Alkali metals have extra electrons in their valence shells which they can donate easily. When it is burned the electrons are excited and when these electrons are coming back they emit photons of light and these are of different colours depending upon the elements and discrete energy levels.
> Potassium imparts Lilac colour in the flame test not the blue colour.
> So the above statement is False.
Hence, the correct option is 0.
Note: If the concentration of metal cation is very low, it cannot be detected by the flame test. Different samples have different light intensity. Presence of impurities, particularly sodium, will affect the results of the flame test.
Complete answer:
> Each element has a characteristic colour. When the chemical composition of each sample is introduced in the flame test there are changes in the colour of the flame. This change in colour helps us to find out which element is present in the given sample.
> When a metal cation is heated in a flame, it results in the excitation of electrons from lower energy level to higher energy level by absorbing the energy in the form of heat. To return to the ground state, the electrons in the excited state emit the visible light.
> Potassium belongs to the alkali metals and present in the Group I of the periodic table. Alkali metals have extra electrons in their valence shells which they can donate easily. When it is burned the electrons are excited and when these electrons are coming back they emit photons of light and these are of different colours depending upon the elements and discrete energy levels.
> Potassium imparts Lilac colour in the flame test not the blue colour.
> So the above statement is False.
Hence, the correct option is 0.
Note: If the concentration of metal cation is very low, it cannot be detected by the flame test. Different samples have different light intensity. Presence of impurities, particularly sodium, will affect the results of the flame test.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)