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alcohol phenol and ether mcq with answer

Phenol is more acidic than ethanol. | (vi) Ni/H2 or NaBH4 or LiAlH4. NCERT Solutions For Class 12 Chemistry Alcohols Phenols and Ether, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. Ans: Ethanol undergoes intermolecular H-bonding due to the presence of a hydrogen atom attached to the electronegative oxygen atom. Indirectly, ethene is first passed through concentrated H2S04, when ethyl hydrogen sulphate is formed. B. Ketones (i)Butan-1-ol (v) 85% H2S04 at 440 K. Ortho and para nitrophenols are more acidic than phenol. Give a mechanism for this reaction. We have provided Alcohols, Phenols and Ethers Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well. 21. C. 1 – hexanol B. C3H7OH C. 1 3 5 -trinitro benzene A. Aldehydes 11.15. 1. This is supported by the fact that the boiling point temperature of o-nitrophenol (100°C) is less than that of p-nitrophenol, (279°C). (ii) The alkoxy group directs the incoming group which is an electrophile towards the ortho and para positions in the ring. A. An alcohol which can be prepared by fermentation is (ii) Oxidation of a primary alcohol to aldehyde. | Ans: 11.7. Media (ii) 2-Methoxy-2-methylpropane (1) Which compound is formed when CH 3 OH reacts with CH 3 −Mg−X A) Acetone B) Alcohol. Name the reagents used in the following reactions: | 11.28. C. CaCl2 chloride → Propan-1-ol Explain the fact that in alkyl aryl ethers, alkoxy group : 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. Notification 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. Explain how does the – OH group attached to a carbon of benzene ring activate it towards electrophilic substitution? Write structures of the compounds whose IUPAC names are as follows: HCI and anhydrous PCl2 (i) 1-nicthylcyclohcxanoland Identify the major product, (a) (b) (c) (d) 2. A. C2H6 (iii) Aqueous bromine, i.e., Br2/H2O. B. Alkyl amine (i) Oxidation of propan-l-ol with alkaline KMnO4 solution. B. As a result, a mixture of isomeric products is formed. View Answer, 30. 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. Ethyl acetate (ii) Reimer – Tiemann reaction – 3. Give the structures and IUPAC names of monohydric phenols of molecular formula, C7H8O. D. Alkynes View Answer, Click On Below Page Numbers To Go To Next/Previous Page of Alcohols Phenols and Ethers MCQs. Ans: Nitro (NO2) group is an electron withdrawing group while methoxy (OCH3) group is electron releasing in nature. 1999; BHU 2000; MP PET 2003], question_answer24) Absolute alcohol is [RPMT 1997], question_answer25) Which of the following is dihydric alcohol [DCE 2004], question_answer26) Wood spirit is known as [AFMC 2004], question_answer27) Oxygen atom in ether is [MP PMT/PET 1988], question_answer28) Which of the following is a simple ether [AFMC 1997], question_answer29) An example of a compound with the functional group \['-O-'\] is [CPMT 1983], question_answer30) Which of the following do not contain an acyl group, question_answer31) Name of \[{{(C{{H}_{3}})}_{2}}HC-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] is [MP PMT 1992], question_answer32) Acetals are [BVP 2003], question_answer33) In ethers, the C - O - C bond angle is, question_answer34) According to Lewis concept of acids and bases, ether is [CPMT 1994], question_answer35) The compound which is not isomeric with diethyl ether is [IIT 1981; CPMT 1989; Bihar MEE 1995; MP PET 2001], question_answer36) Structure of diethyl ether is confirmed by [DPMT 1985], question_answer37) Fermentation is an [CPMT 1977; RPMT 1999], question_answer39) Which of the following are known as mercaptans [Pb.

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2020-11-14 | Posted in 自治会からのお知らせComments Closed