Answer
Verified
461.4k+ views
Hint:
Acetylene is an alkyne. On polymerisation, it gives us benzene which has 6 carbon atoms. Each atom is attached to two other carbon atoms one by a double bond and the other through a single bond. All carbon atoms in an alkane are $s{{p}^{3}}$ hybridised and that of an alkene and alkyne are $s{{p}^{2}}$ and $sp$ respectively.
Complete step by step answer:
We know that hybridisation of an atom is the number of other atoms it is attached with through a chemical bonding.
For example, if the carbon atom is attached through other carbon atoms through a single bond the hybridisation is $s{{p}^{3}}$ but when it becomes doubly or triply bonded, the hybridisation becomes $s{{p}^{2}}$ and $sp$ respectively.
We can easily tell the hybridisation of an atom by looking at its substituents.
Here, we have acetylene which is the smallest alkyne, and is a hydrocarbon. We also know it is ethyne.
The chemical formula of ethyne or acetylene is ${{C}_{2}}{{H}_{\,2}}$. Here, we have a triple bond between the two carbon atoms and one hydrogen atom is attached to each of the carbon. We can write acetylene as-
In acetylene, both the carbons have a sp hybridisation.
As we know, polymerisation means repeating a single unit multiple times to attain a network of atoms. Here, acetylene is polymerised to give us benzene.
When acetylene is passed through a red hot iron tube, we get benzene-
3moles of acetylene reacts to form 1 mole of benzene.
As we can see from the above reaction, the formula of benzene is ${{C}_{6}}{{H}_{6}}$. Benzene has three carbon-carbon double bonds and three carbon-carbon single bonds and each carbon has a hydrogen atom attached to it. However, each carbon atom forms different bonds (single and double) with two carbon atoms which are again forming two dissimilar bonds with other carbon atoms.
Therefore, the hybridisation of carbon on benzene is $s{{p}^{2}}$.
Therefore, polymerisation of acetylene to benzene changes hybridisation from $sp$ to $s {{p}^{2}}$.
Therefore, the correct answer is option [C] $sp$ to $s{{p}^{2}}$.
Note:
Formation of benzene from acetylene is a cyclic polymerisation reaction, which is an intramolecular reaction and it is carried out at a very high temperature of 873 kelvin.
We should not be confused by the two dissimilar bonds formed by benzene. Taking any of the six carbon atoms into consideration, we will get a carbon-carbon double bond and therefore, we can say that the carbons are $s{{p}^{2}}$ hybridised.
Acetylene is an alkyne. On polymerisation, it gives us benzene which has 6 carbon atoms. Each atom is attached to two other carbon atoms one by a double bond and the other through a single bond. All carbon atoms in an alkane are $s{{p}^{3}}$ hybridised and that of an alkene and alkyne are $s{{p}^{2}}$ and $sp$ respectively.
Complete step by step answer:
We know that hybridisation of an atom is the number of other atoms it is attached with through a chemical bonding.
For example, if the carbon atom is attached through other carbon atoms through a single bond the hybridisation is $s{{p}^{3}}$ but when it becomes doubly or triply bonded, the hybridisation becomes $s{{p}^{2}}$ and $sp$ respectively.
We can easily tell the hybridisation of an atom by looking at its substituents.
Here, we have acetylene which is the smallest alkyne, and is a hydrocarbon. We also know it is ethyne.
The chemical formula of ethyne or acetylene is ${{C}_{2}}{{H}_{\,2}}$. Here, we have a triple bond between the two carbon atoms and one hydrogen atom is attached to each of the carbon. We can write acetylene as-
In acetylene, both the carbons have a sp hybridisation.
As we know, polymerisation means repeating a single unit multiple times to attain a network of atoms. Here, acetylene is polymerised to give us benzene.
When acetylene is passed through a red hot iron tube, we get benzene-
3moles of acetylene reacts to form 1 mole of benzene.
As we can see from the above reaction, the formula of benzene is ${{C}_{6}}{{H}_{6}}$. Benzene has three carbon-carbon double bonds and three carbon-carbon single bonds and each carbon has a hydrogen atom attached to it. However, each carbon atom forms different bonds (single and double) with two carbon atoms which are again forming two dissimilar bonds with other carbon atoms.
Therefore, the hybridisation of carbon on benzene is $s{{p}^{2}}$.
Therefore, polymerisation of acetylene to benzene changes hybridisation from $sp$ to $s {{p}^{2}}$.
Therefore, the correct answer is option [C] $sp$ to $s{{p}^{2}}$.
Note:
Formation of benzene from acetylene is a cyclic polymerisation reaction, which is an intramolecular reaction and it is carried out at a very high temperature of 873 kelvin.
We should not be confused by the two dissimilar bonds formed by benzene. Taking any of the six carbon atoms into consideration, we will get a carbon-carbon double bond and therefore, we can say that the carbons are $s{{p}^{2}}$ hybridised.
Recently Updated Pages
Who among the following was the religious guru of class 7 social science CBSE
what is the correct chronological order of the following class 10 social science CBSE
Which of the following was not the actual cause for class 10 social science CBSE
Which of the following statements is not correct A class 10 social science CBSE
Which of the following leaders was not present in the class 10 social science CBSE
Garampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSE
Trending doubts
A rainbow has circular shape because A The earth is class 11 physics CBSE
Which are the Top 10 Largest Countries of the World?
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What was the Metternich system and how did it provide class 11 social science CBSE
How do you graph the function fx 4x class 9 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE