13 Nov alcohol phenol and ether mcq with answer
(i)Butan-1-ol Phenol is more acidic than ethanol. View Answer, 14. | 11.15. Ans: 11.32. (i) Propane → Propan-2-ol (i) 1 -phenylethanol from a suitable alkene. (iv) Friedel-Craft’s acetylation of anisole. B. Glycerol Identify aliylic alcohols in the above examples. Ethylene glycol H2S04and NaOH. As a result, a mixture of isomeric products is formed.
C. Oxidation The raw materials are benzene and propene and it initially proceeds by Friedel Crafts alkylation of benzene. Write mechanism of the reaction. Ans: Acid catalysed dehydration of primary alcohols to ethers occurs by SN2 reaction involving nucleophilic attack by the alcohol molecule on the protonated alcohol molecule. 11.6. You are given benzene, cone. Write the mechanism of hydration of ethene to yield ethanol. For example, ethyl methyl ether, methyl phenyl ether, 4-chlorophenyl- 4-nitrophenyl ether, etc. (ii) directs the incoming substituents towards ortho and para positions in the ring. Which compound shows hydrogen bonding? Write the equations for the preparation of phenol using these reagents. View Answer, 17.
Ans: All the alcohols are formed by the hydration of alkenes in the acidic medium. (i) Reimer-Tiemann reaction (iv) Methoxyethane. Ans: The addition of diborane to alkenes to form trialkyl boranes followed by their oxidation with alkaline hydrogen peroxide to form alcohols is called hydroboration-oxidation. (iv) Methyl mag. Notification (xi) 1-Phenoxyheptane Franchise 1. Explain why propanol has higher boiling point than that of the hydrocarbon, butane? Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate? Destructive distillation of wood C. Methane D. All View Answer. (ii)2-Methylbutan-2-ol Write equations of the following reactions: solution to form phenol and acetone as follows: 11.10. 11.11. C. CH3OCH3 View Answer, 12. Sarnie Paper 2015) The addition follows Markownikov’s rule. Ans: The mechanism of dehydration of alcohols to form alkenes occur by the following three steps: 11.20. Ans: 11.11. NCERT SolutionsMathsPhysicsChemistryBiologyScience, Filed Under: CBSE, Class 12 Chemistry Tagged With: NCERT Solutions For Class 12 Chemistry Alcohols Phenols and Ether, RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, NCERT Solutions For Class 12 Chemistry Chapter 11 Alcohols Phenols and Ether. Therefore, the boiling point of ethanol is higher than that of methoxymethane which does not form H-bonds. | (v)1-Ethoxypropane Questions And Answers Alcohols Phenols And Ethers Questions And Answers Anupam Roy April 22, 2020 no Comments . Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Answer. PMT 2002], Copyright © 2007-2020 | B. | In other words, presence of -OH group, activates the benzene ring towards electrophilic substitution reactions. In case of asymmetrical ether, the alkyl halide is always formed from the smaller alkyl group provided no tertiary (3°) alkyl group is present and if any 3° alkyl group is present, the halogen gets attached with it.
Answer: (b) | Write chemical reaction for the preparation of phenol from chlorobenzene. Instead protonated 2° and 3° alcohols lose a molecule of water to form stable 2° and 3° carbocation. Give IUPAC names of the following ethers. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives (a) diphenyl ether (b) p-hydroxyazobenzene (c) chlorobenzene (d) Benzene. 11.19. Since Williamson’s synthesis occurs by SN2 mechanism and primary alkyl halides are most reactive in Sn2 reaction, therefore, best yields of unsymmetrical ethers are obtained when the alkyl halides are primary and the alkoxide may be primary, secondary or tertiary. Thus, the alkyl halide should be derived from ethanol and the alkoxide ion from 3-methylpentan-2-ol. | 11,24. Protonation of the given alcohol followed by loss of water gives a 2° carbocation(I), which being unstable rearranges by 1,2-hydride shift to form the more stable 3° carbocation (II). (vii) 2,5-DimethylphenoI (x) Ethoxybenzene C. Alkanes Study Packages
Answer… Predict the major product of acid catalysed dehydration of (iv) Benzyl alcohol to benzoic acid.
| (i) activates the benzene ring towards electrophilic substitution. Ethylene glycol For example: .o-nitrophenol is steam volatile while p-nitrophenol is not. (vi) Ni/H2 or NaBH4 or LiAlH4. (iv) Methyl mag. C. Glycerol
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