phenol questions and answers

Published by on November 13, 2020

iii) O2N-C6H4-OCH3(p) Explain why ortho-nitrophenol is more acidic than ortho-methoxy phenol? 2. If an equilibrium mixture contains 0.44 M IBr and 1.1×10−2 M I2, what is the molar concentration of Br2? Give IUPAC names of the following ethers: What are the… Since the intermolecular forces in ethanol are stronger than those in methoxymethane it has higher boiling point than methoxymethane. – O – is the functional group of ether. Question 10. (a) phenol and methyl iodide Question 1. Answer: By the removal of a proton from phenol a phenoxide ion is obtained. 1. You need to produce 700. g of acetic acid using the re... Q: How many grams of X (MW = 44.20 g/mol)(in g) will be deposited on a cathode in 1.91 h by a current o... Q: The equilibrium constant, Ke, for the following reaction is 5.10×10-6 at 548 K. Substantiate this statement with the help of an equation. (a) Name the starting material used in the industrial preparation of phenol. Hence, the reaction gives pure alkyl halides. Answer: To make students understand the concepts, some solved questions are also included here. CBSE Class 10 Science Extra Questions & Answers for Chapter 9- Heredity and Evolution (Based on NCERT Book) 5 hrs ago SSC SI & ASI Medical Exam Date 2020 Announced for … What are the molality, mole fraction, and molarity of phenol in the solution? Phenols: Phenols are the chemical compounds that consist of hydroxyl group bonded directly to aromatic hydrocarbon group. ii) 2-Chloro-1-methoxyethane (ii) Phenol is more acidic than ethanol (iii) O-and -P - nitrophenols are more acidic than phenol . a. 1. (d) All of these, Question 4. (b) Write the chemical reaction for the preparation of phenol from chloro benzene, (a) Write a suitable chemical equation to complete each of the following transformations: (i) Butan-1-ol to butanoic acid . First it is diluted to 10% solution. ortho-Nitrophenol is more acidic than ortho- methoxyphenol because nitro group by its electron withdrawing resonance effect stabilises the phenoxide ion whereas methoxy group by its electron releasing effect destabilises the phenoxide ion. The tertiary alkyl halide undergoes elimination in presence of base to form alkene. Question 1. This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. Answer: These notes are prepared by Subject Experts of Chemistry after the detailed analysis of latest syllabus and pattern of the examination. It is then evaporated under reduced pressure to remove NaCI. This on acidification gives phenol. What Are Antiseptics? D is resistant to oxidation but compound A can be easily oxidised. By the action of benzene with conc.H2SO4 & NaOH, sodium benzene sulphonate is formed. 1-(4-hydroxy-3,5-dimethylphenyl)ethanone. Answer : Phenol. 3. 2. (b) iodobenzene and methanol d) Alcohols do not lose H atoms at all, 6. Doubts solved by panel of Post-graduate/ PhD … (b) III > I > II (b) What is meant by the secondary structure of proteins? Ethyl alcohol gives iodoform test. (a) 1- propanol. Join Yahoo Answers and get 100 points today. The density of the solution is 1.602g/mL. PHENOL Prototype - Jam 1 A very early recording of the prototype PHENOL unit in the studio! Answer: a) Br p position to OH , Br m position to NO2 group. An organic compound A having molecular formula $C_6H_6O$ gives a Question and Answer forum for K12 Students. Volume of NH3 solution = 59.1 mL = 0.0591 L                 ... Q: (0) (b) Hofmann’s synthesis. Ethanol molecules are associated by intermolecular hydrogen bonding. The resonating structure of phenoxide ion is given below. 2° alcohol + Lucas reagent → turbidity within five minutes, 3° alcohol + Lucas reagent → turbidity occurs immediately. Phenol. a. Students can refer these notes before the examination to save their precious time. Presence of peroxide can be tested by adding ferrous salt solution followed by addition of KCNS solution. Median response time is 34 minutes and may be longer for new subjects. Prepare phenol using these compounds. 1. (iv) Phenol is an acid but does not react with sodium bicarbonate solution . 1. Tamilnadu Board Class 10 English Solutions, Tamilnadu Board Class 9 Science Solutions, Tamilnadu Board Class 9 Social Science Solutions, Tamilnadu Board Class 9 English Solutions, Chemistry MCQs for Class 12 Chapter Wise with Answers, Chemistry MCQs for Class 12 with Answers Chapter 10 Haloalkanes and Haloarenes, Chemistry MCQs for Class 12 with Answers Chapter 13 Amines, MCQ Questions for Class 11 Biology with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Chemistry with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Physics with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Maths with Answers Chapter Wise PDF Download, Maths Formulas for Class 6 to Class 12 PDF | All Basic Maths Formulas. Which of the following reactions is better for ether synthesis? About 2-3 questions have always been asked from this chapter in the examination. Hence, diethyl ether is soluble in water while n-butane is not. Still have questions? (d) phenol and methanal b) Phenol is more acidic than ethanol. $H_2SO_4$ Which compound is predominantly formed when phenol is allowed to react with bromine in aqueous medium? 3. (d) NaOH How can you prepare glycerol from spentlye? Benefits. Chlorination of toluene in presence of light and heat followed by treatment with aqeous KOH gives ________ Ortho-Nitrophenol is steam volatile because in it there is intramolecular hydrogen bonding. (d) Cinnamic acid, 7. Which of the following reagents can be used to oxidised primary alcohol to aldehydes ? 2. An aromatic compound 'A' on treatment with $CHCl_3/KOH$ gives two compounds 'B' and 'C'. (b) Draw the skeletal structure of the major organic product. b) Reimer-Tiemann reaction (c) 2° > 1° > 3° 1. (c) benzene and methyl iodide (a)Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene and why? With the help of solved questions given here aspirants can get familiar with the difficulty level of the question paper. Pharmaceutical Quality Assurance Interview Questions ; Question 41. Para-methoxylphenyl group is electron donating which stablises the carbocation. It is first treated with acid to remove alkali, then with aluminium sulphate to remove soluble soap. Answer: Question 9. Quaternary Ammonium Compounds? (a) Phenoxide ion is stablised by resonance A lot of heat is required to break intermolecular hydrogen bonding among propanol molecules. (b) C2H5OH (a) Illustrate the following reactions giving a suitable example for each : (i) Cross aldol condensation (ii) Decarboxylation (b) Give Simple tests to distinguish between the following pairs of compounds : (i) Pentan -2-one and pentan -3-one (ii) Benzaldehyde and Acetophenone (iii) Phenol and Benzoic acid . 2. Ethyl alcohol denatured by adding methyl alcohol, is highly poisonous. Solution for A solution of 4.55 % phenol (C6H6O) solution by mass in carbon tetrachloride, CCl4. 3. Answer: Molasses is the mother liquor left behind after the crystallisation of cane sugar from sugar cane juice. Phenols are more acidic than alcohols because Compare the solubility of diethyl ether and n- butane in water. WBJEE: Important Questions and Preparation Tips – Atomic Structure. Camphor and Phenol > Camphor and Phenol Answers FoundHealth is a place where people share their treatment experiences. b) Fries rearrangement to 4-acetyl-2,6-dimethylphenol or . ii) CH3OCH2CH2CI WBJEE 2018: Notification, Application, Dates, Eligibility, Exam Pattern, Syllabus, List of Colleges Offering Engineering in India, View best Engineering Colleges in Hyderabad. Compound A when dehydrated with explain . Yes. Question 12. vi) Ethoxybenzene. If you have any query regarding CBSE Class 12 Chemistry Alcohols, Phenols, and Ethers MCQs Pdf, drop a comment below and we will get back to you at the earliest.

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