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Myschool please try to give a better explanation. Both the video and the note you guys gave us are vague. The man in the video just said the answer without any explanation 
To determine the number of π (pi) bonds in an alkene with six carbon atoms, we need to consider the general structure of an alkene.
Alkenes have at least one carbon-carbon double bond (C=C), which consists of one σ (sigma) bond and one π (pi) bond.
Since the question asks about an alkene with six carbon atoms, let's assume it's a simple alkene with one double bond:
CH₂=CH-CH₂-CH₂-CH₂-CH₃
In this molecule, there is only one carbon-carbon double bond, which means there is only:
1 π (pi) bond
The correct answer is:
A. 1
for alkane,there is 0 π -bond
for alkene,there is 1 π -bond
for alkyne,there are 2 π -bonds
Therefore,answer is not in the option.
In an alkene each carbon atom forms four bonds. so in a six-carbon alkene, the basic structure would be a chain of six carbon atoms with alternating single and double bonds.
Each carbon-carbon double bond consists of one sigma bond and one pi bond. Since there are three double bonds in the alkene and there are also three pi bonds.
So, the correct answer is d
everything is just confusing both the explanation and answers.... first time hearing sigma and pie bond sef 
This question isn't correct
Hexene has only one Pi bond
Note: We were not told it is Hex-1, 2-diene or something else
Just Hexene which means it has only one double bond.
Hence one Pi bond.
The answer to this is one(1) and not four (4) please the correction should be made!
The number of 6 carbon mentioned is just a distraction
so in
Alkane - there is only 1 sigma bond no pi bond
Alkene- 1 sigma bond, 1pi bonds
Alkyne- 1 sigma, 2 pi bonds
so Alkene has 1 pi bonds
A is correct done.
An alkene is a hydrocarbon that contains at least one carbon-carbon double bond (C=C). Each double bond consists of one sigma (σ) bond and one pi (π) bond.
If an alkene has 6 carbon atoms, the number of pi bonds depends on the number of double bonds present in the molecule.
For a simple alkene like hexene (C₆H₁₂), there is only one double bond, meaning there is only one π bond.
If the molecule has more than one double bond (like in dienes or polyenes), the number of pi bonds increases accordingly.
So, in a simple alkene with 6 carbons (like hexene), there is only 1 pi bond.
How's this question even correct...? When we all know that a more correct alkene with six carbon atom is Hex-1-ene
Alkenes:
Alkenes are a class of organic compounds that contain at least one carbon-carbon double bond (C=C).
The double bond consists of two parts: a sigma (σ) bond and a pi (π) bond.
Sigma (σ) Bond:
The sigma bond results from the overlap of hybrid orbitals between adjacent carbon atoms.
It allows rotation around the bond axis.
Pi (π) Bond:
The pi bond arises from the overlap of parallel p orbitals above and below the plane of the sigma bond.
It restricts rotation around the bond axis.
Double Bond in Alkenes:
In an alkene, the double bond consists of one sigma bond and one pi bond.
The pi bond is responsible for the rigidity of the double bond.
Example:
Consider ethene (C₂H₄), the simplest alkene.
It has one carbon-carbon double bond.
This double bond includes one sigma bond (σ) and one pi bond (π).
Counting Pi Bonds:
To determine the number of pi bonds in an alkene, count the number of double bonds.
Each double bond contributes one pi bond.
Answer to the Question:
The question asked about an alkene with six carbon atoms.
Since there are three carbon-carbon double bonds, the total number of pi bonds is 3.
Therefore the correct answer is D
