Answer
Verified
425.4k+ views
Hint:
The colour of the flame that is observed when a substance is burnt or ignited in air, is a characteristic property and unique to each element or compound. It can also be used as a measure of detection or identification of the various elements or compounds associated with it.
Complete step by step answer:
When we give energy to any substance, the kinetic energy of the particles of the substance increases. This means that the elementary particles absorb this energy and are at elevated positions on the energy graph. If the energy transmitted to particles crosses a certain value, that substance then catches fire and bursts into flames.
The colour of light emitted by these flames depends on the energy that is emitted by each electron while it is returning to its original energy state. Since the electronic configuration of different elements is different, the number of electrons in the valence shell also differ. This means that there might be more or less electrons elevating to a higher energy state and then returning back to give the flame its colour. Hence, different substances may have different colours of flame.
In accordance with the theory presented above, the colours of the flames of the given elements, namely Li, Na, K and Rb and their salts are crimson red, golden yellow, lilac and red-violet respectively.
Hence, Option D is the correct option.
Note:
Since the electronic configuration of the metals can be exhibited in the salts that they form with other anions, their corresponding salts too carry on the same colour for the flame most of the time.
The colour of the flame that is observed when a substance is burnt or ignited in air, is a characteristic property and unique to each element or compound. It can also be used as a measure of detection or identification of the various elements or compounds associated with it.
Complete step by step answer:
When we give energy to any substance, the kinetic energy of the particles of the substance increases. This means that the elementary particles absorb this energy and are at elevated positions on the energy graph. If the energy transmitted to particles crosses a certain value, that substance then catches fire and bursts into flames.
The colour of light emitted by these flames depends on the energy that is emitted by each electron while it is returning to its original energy state. Since the electronic configuration of different elements is different, the number of electrons in the valence shell also differ. This means that there might be more or less electrons elevating to a higher energy state and then returning back to give the flame its colour. Hence, different substances may have different colours of flame.
In accordance with the theory presented above, the colours of the flames of the given elements, namely Li, Na, K and Rb and their salts are crimson red, golden yellow, lilac and red-violet respectively.
Hence, Option D is the correct option.
Note:
Since the electronic configuration of the metals can be exhibited in the salts that they form with other anions, their corresponding salts too carry on the same colour for the flame most of the time.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Why Are Noble Gases NonReactive class 11 chemistry CBSE
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Write a letter to the principal requesting him to grant class 10 english CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Difference Between Plant Cell and Animal Cell
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE