The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.
Hence, option D is correct answer.
What is Double Covalent Bond ?
A double covalent bond is a type of covalent bond which involves the sharing of two pairs of electrons.
What is Covalent Bond ?
A covalent bond is a type of chemical bond that involves the sharing of electron pairs between the atoms.
Now lets check all options one by one
Option (A): CH₃Cl
In CH₃Cl carbon has 4 valence electrons and carbon shares its 1 electron each with three hydrogen atoms and carbon shares its 1 electron with chlorine. Here bonds are formed due to sharing of electrons between the atoms. Hence CH₃Cl is covalent bonded.
So, it is incorrect option.
Option (B): C₂H₃Cl
In C₂H₃Cl, here two carbon atoms form double bond but they not form covalent bond.
So it is incorrect option.
Option (C): C₂H₂
In C₂H₂, each carbon has 4 valence electrons and each carbon shares its one electron with each hydrogen atom here two carbon atoms are triple bonded.
So, it is incorrect option.
Option (D): C₂H₄
In C₂H₄, there are two carbon atoms and two hydrogen atoms, here two carbon atoms are double bonded.
So, it is correct option.
Thus, from above conclusion we can say that The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.
Learn more about Covalent bond here: https://brainly.com/question/12732708
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