SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CH3CH3 < CH3CHO < CH3CH2OH
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CH3CHO < CH3CH2OH < CH3CH3
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CH3CH2OH < CH3CH3 < CH3CHO
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CH3CH3 < CH3CH2OH < CH3CHO
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Detailed explanation-1: -CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3 (increasing order of boiling points)
Detailed explanation-2: -CH3CH2OH C H 3 C H 2 O H will have a higher boiling point because the presence of the hydroxyl (-OH) group makes CH3CH2OH C H 3 C H 2 O H molecules are capable of hydrogen bonding with each other. Hydrogen bonds are the strongest intermolecular forces possible in small molecules like those given in this question.
Detailed explanation-3: -(c) Both CH3OH and CH3CH2OH can H-bond but CH3CH2OH has more CH bonds for greater dispersion force interactions. Therefore, CH3CH2OH has the higher boiling point.
Detailed explanation-4: -Ethanol, CH3CH2OH (mw=46) has a boiling point of 78ยบ.
Detailed explanation-5: -AI Recommended Answer: CH3CH3 has the highest boiling point out of all the compounds. This is because it has a greater mass and number of electrons. This causes greater dispersion forces and a higher boiling point. CH4 has weaker dispersion forces than CH3CH3, which means it has a lower boiling point.