Which compound is classified as a hydrocarbon?
2 answers:
<u>Answer:</u> The correct answer is Option 2.
<u>Explanation:</u>
Hydrocarbons are defined as the compounds which have a covalent bond present between hydrogen and carbon atoms. For Example: is a hydrocarbon.
are not considered as hydrocarbons.
For the given options:
<u>Option 1:</u> butanal
The chemical formula for this compound is
This is not considered as a hydrocarbon because a covalent bond is present between carbon and oxygen atom.
<u>Option 2:</u> butyne
The chemical formula for this compound is
This is considered as a hydrocarbon because covalent bonds are present between carbon and hydrogen atoms only.
<u>Option 3:</u> 2-butanol
The chemical formula for this compound is
This is not considered as a hydrocarbon because a covalent bond is present between carbon and oxygen atom.
<u>Option 4:</u> 2-butanone
The chemical formula for this compound is
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.
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Answer : Carbon tetrachloride, will show the greatest freezing point lowering.
Explanation :
For non-electrolyte solution, the formula used for lowering in freezing point is,
where,
= lowering in freezing point
= molal depression constant
m = molality
As per question, the molality is same for all the non-electrolyte solution. So, the lowering in freezing point is depend on the only.
That means the higher the value of , the higher will be the freezing point lowering.
From the given non-electrolyte solutions, the value of of carbon tetrachloride is higher than the other solutions.
Therefore, Carbon tetrachloride, will show the greatest freezing point lowering.