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alcohol phenol and ether mcq with answer

alcohol phenol and ether mcq with answer

bromide → 2-Methylpropan-2-ol. HCI and anhydrous SOCl2 Write the equation of the reaction of hydrogen iodide with (i)1-propoxypropane (ii)methoxybenzene, and (iii)benzyl ethyl ether (ix)Cyclopcnt-3-en-l-ol C. As a substitute for petrol 11.6. View Answer, 20. B. For example, tert-butylethyl ether is prepared by treating ethyl bromide with sodium tert-butoxide. D. Carboxylic acid Which compound shows hydrogen bonding? 11.3. 11.15. Phenol is more acidic than ethanol. 11.2. 11.12. Which compound is also known by the name of carbolic acid? 3 sec, OTP has been sent to your mobile number and is valid for one hour, Picric acid is [CPMT 1971, 80, 81; DPMT 1983; MP PMT 1990; BHU 1996], Glycerol is a [DPMT 1984, 2000; MP PET 2001; J & K 2005], Carbon percentage is maximum in [BHU 1998], Glycerine has [MP PMT/PET 1988; MP PMT 1989, 91; AIIMS 1997], Which of the following is tertiary alcohol [DPMT 2000], Which is primary alcohol [CPMT 1980], General formula of primary alcohol is [CPMT 1975], Which of following is phenolic [J & K 2005], 1, 2, 3-trihydroxybenzene is also known as, Butanal is an example of [MP PET 1991], The characteristic grouping of secondary alcohols is [DPMT 1984], Which of the following are isomers [AFMC 2005; BCECE 2005], The compound \[HOC{{H}_{2}}-C{{H}_{2}}OH\] is, The structural formula of cyclohexanol is [Bihar CEE 1995], Carbolic acid is [MP PET/PMT 1998; RPET 1999; KCET (Engg./Med.) (ix) 1-Methoxy-2-methylpropane Answer… For your convenience I have added a pdf that you can download. When phenol is heated with concentrated nitric acid the product is | Explain how does the – OH group attached to a carbon of benzene ring activate it towards electrophilic substitution? A. Cyclohexane (iv) The cyclic alkene used in this reaction is 2-cyclohexylbut-2-ene. (iii) Pentan-l-ol using a suitable alkyl halide? As a result of +R effect of the -OH group, the electron density in the benzene ring increases thereby facilitating the attack of an electrophile. D. C2H5OH Ans: 11.6. Sarnie Paper 2015) | Ans: 11.13. Download Now! NEET help on Whatsapp Chat. Write structures of the products of the following reactions: An alcohol which can be prepared by fermentation is (ii)2-Methylbutan-2-ol Notes D. None of these The carbocation is generated by the protonation of the hydroxyl group, followed by the loss of water. Give the IUPAC name of the following […] Franchise The given dissociation constant (Ka) value 1.3×10-10 is of Predict the major product of acid catalysed dehydration of Jobs Videos Name the reagents used in the following reactions: The sodium alkoxide needed for the purpose is prepared by the action of sodium on a suitable alcohol. (ii) 2-Methoxy-2-methylpropane Write the mechanism of acid dehydration of ethanol to yield ethene. (iii) Dilute HNO 3 acid with phenol (iv) Treating phenol with chloroform in presence of aqueous NaOH. Write the reactions of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol. The carbocation is generated by the protonation of the hydroxyl group, followed by the loss of water. e-nkrophenol p-nnrophenol. (iv) Benzyl alcohol to benzoic acid. Ans: 11.4. Explain the following with an example Absolute alcohol is obtained when the rectified spirit is treated with View Answer, 28. Ans: 11.18. Give two reactions that show the acidic nature of phenol. (iv) Unsymmetrical ether As an anti-freezing agent 11.15. Ans: (i) Kolbe’s reaction: Sodium phenoxide when heated with C02 at 400K under a pressure of 4-7 atmospheres followed by acidification gives 2-hydroxybenzoic acid (salicylic acid) as the major product along with a small amount of 4-hydroxybenzoic acid.This reaction is called Kolbe’s reaction. 1. 11.19. A. Aldehydes 11.7. MCQs on Alcohols, Phenols and Ethers. Give a mechanism for this reaction. Questions Bank (iii) Williamson ether synthesis NEET and AIPMT NEET Chemistry Alcohols,Phenols and Ethers MCQ questions & solutions with PDF and difficulty level. Explain the following with an example (i) Kolbe’s reaction (ii) Reimer – Tiemann reaction – (iii) Williamson ether synthesis (iv) Unsymmetrical ether Contents1 Important Questions for CBSE Class 12 Chemistry – Alcohols, Phenols And Ethers1.1 PREVIOUS YEARS QUESTIONS1.1.1 20151.1.2 Very Short Answer Type Questions [1 Mark]1.1.3 Short Answer Type Questions [II] [3 Marks]1.1.4 Long Answer Type Questions [5 Marks]1.1.5 20141.1.6 Very Short Answer Type Questions [1 Mark]1.1.7 Short Answer Type Questions [I] [2 Marks]1.1.8 Short Answer … | 11.16. Ans: Primary alcohols: (i), (ii), (iii) For example. (ii) Bromine in CS2 with phenol. 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). Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. ... methyl alcohol (c) diethyl ether (d) acetone. Therefore, they are soluble in water. A. Ans: (i) Reimer-Tiemann reaction, 11.10. | 1. Write mechanism of the reaction. 1. Alcohols and phenols both contain a hydroxyl group (-OH). As a solvent (vi) Butan-2-one to butan-2-oL . FAQ In o-nitrophenol, there is intramolecular hydrogen bonding in OH and NO2 groups placed in a adjacent positions. A. Ans: | Answer: Option C. 23. Phenol was isolated by Runge from Indirectly, ethene is first passed through concentrated H2S04, when ethyl hydrogen sulphate is formed. (ii) The alkoxy group directs the incoming group which is an electrophile towards the ortho and para positions in the ring. Ans: (i)1-Ethoxy-2-methylpropane C. Wood This is on account of intramolecular hydrogen bonding in the molecules of o-nitrophenol. A. CH3OH

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