Which compound is classified as a hydrocarbon?
1. butanal
2. butyne
3. 2-butanol
4. 2-butanone
Answer (2)
Hydrocarbons are defined as the compounds which have a covalent bond present between hydrogen and carbon atoms. For Example: C H 4 is a hydrocarbon. H 2 O , C O 2 are not considered as hydrocarbons.
For the given options:
Option 1: ** butanal**
The chemical formula for this compound is C H 3 C H 2 C H 2 C H O
This is not considered as a hydrocarbon because a covalent bond is present between carbon and oxygen atom.
Option 2: ** butyne**
The chemical formula for this compound is C H ≡ CC H 2 C H 3
This is considered as a hydrocarbon because covalent bonds are present between carbon and hydrogen atoms only.
Option 3: ** 2-butanol**
The chemical formula for this compound is C H 3 C H ( O H ) − C H 2 C H 3
This is not considered as a hydrocarbon because a covalent bond is present between carbon and oxygen atom.
Option 4: ** 2-butanone**
The chemical formula for this compound is C H 3 C ( O ) − C H 2 C H 3
This is not considered as a hydrocarbon because a covalent bond is present between carbon and oxygen atom.
From the above information, the correct answer is Option 2.
The compound that is classified as a hydrocarbon from the given options is butyne, as it consists solely of carbon and hydrogen. The other options contain oxygen, which disqualifies them from being classified as hydrocarbons. Therefore, the correct answer is Option 2: Butyne.
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