Give a reason for the higher boiling point of ethanol in comparison to methoxymethane.
Give a reason for the higher boiling point of ethanol in comparison to methoxymethane.
Solution and Explanation
Ethanol undergoes intermolecular H-bonding due to the presence of the -OH group, resulting in the association of molecules. Extra energy is required to break these hydrogen bonds. On the other hand, methoxymethane does not undergo H-bonding. Hence, the boiling point of ethanol is higher than that of methoxymethane.
Top Questions on Alcohols, Phenols And Ethers
- Can sodium ethoxide and t-butyl chloride be used for the preparation of t-butyl ethyl ether? Give suitable explanation. Justify your answer by suggesting the appropriate starting material required for preparation of t-butyl ethyl ether.
- CBSE CLASS XII - 2025
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Arrange the following compounds in increasing order of their boiling points:
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The reaction
suggests that phenol is :- CBSE CLASS XII - 2025
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In the reaction R–OH + HCl $\xrightarrow{\text{ZnCl}_2}$ RCl + H$_2$O, what is the correct order of reactivity of alcohols?
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Questions Asked in CBSE CLASS XII exam
- A proton moving with velocity \( V \) in a non-uniform magnetic field traces a path as shown in the figure. The path followed by the proton is always in the plane of the paper. What is the direction of the magnetic field in the region near points P, Q, and R? What can you say about relative magnitude of magnetic fields at these points?
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Rishika and Shivika were partners in a firm sharing profits and losses in the ratio of 3 : 2. Their Balance Sheet as at 31st March, 2024 stood as follows:
Balance Sheet of Rishika and Shivika as at 31st March, 2024Liabilities Amount (₹) Assets Amount (₹) Capitals: Equipment 45,00,000 Rishika – ₹30,00,000
Shivika – ₹20,00,00050,00,000 Investments 5,00,000 Shivika’s Husband’s Loan 5,00,000 Debtors 35,00,000 Creditors 40,00,000 Stock 8,00,000 Cash at Bank 2,00,000 Total 95,00,000 Total 95,00,000 The firm was dissolved on the above date and the following transactions took place:
(i) Equipements were given to creditors in full settlement of their account.
(ii) Investments were sold at a profit of 20% on its book value.
(iii) Full amount was collected from debtors.
(iv) Stock was taken over by Rishika at 50% discount.
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Concepts Used:
Classification - Alcohols, Phenols and Ethers
Alcohols, phenols, and ethers are organic compounds that can be classified based on their molecular structure and functional groups.
Classification of Alcohols:
- Alcohols can be classified as primary, secondary, or tertiary, based on the number of alkyl groups attached to the carbon atom bearing the hydroxyl group.
- Primary alcohols have one alkyl group attached to the carbon, secondary alcohols have two, and tertiary alcohols have three.
Classification of Phenols:
- Phenols can be classified based on the number and position of the hydroxyl groups attached to the aromatic ring.
- Monohydroxy phenols have one hydroxyl group, while dihydroxy phenols have two.
- Polyhydroxy phenols have more than two hydroxyl groups.
- Resorcinol and catechol are examples of dihydroxy phenols, while tannins are examples of polyhydroxy phenols.
Classification of Ethers:
- Ethers can be classified based on the nature of the alkyl or aryl groups attached to the oxygen atom.
- Simple ethers have two alkyl or aryl groups, while mixed ethers have one alkyl and one aryl group.
- Crown ethers are cyclic ethers that contain multiple ether groups and are used as complexing agents.
In summary, alcohols, phenols, and ethers can be classified based on their molecular structure and functional groups. Understanding the classification of these compounds is important for predicting their reactivity and understanding their potential applications in various fields, including chemistry, biology, and industry.