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question_answer1) What are alcohols ?
question_answer2) What is rectified spirit ?
question_answer3) Name the alcohol used for polishing wooden furniture.
question_answer4) Name a trihydric alcohol.
question_answer5) What is allylic alcohol?
question_answer6) Write formula of a benzylic alcohol.
question_answer7) What is the hybridisation of carbon linked with group in vinylic alcohol.
question_answer8) Suggest the most probable product.
question_answer9) Suggest the most probable product.
question_answer10) Which type of alcohol is formed by hydroboration oxidation of unsymmetrical alkene?
question_answer11) Suggest the product of the reaction. (i) (ii)
question_answer12) Suggest the product of the reaction. (i) (ii)
question_answer13) Why is used for preparing special chemicals only?
question_answer14) Among acids and esters which can be reduced to alcohol easily by catalytic hydrogenation?
question_answer15) Which compound gives a primary alcohol by reacting with alky magnesium halide followed by hydrolysis?
question_answer16) Name the product formed by reaction of Grignard's reagent with an aldehyde followed by hydrolysis.
question_answer17) How tertiary alcohol can be prepared from Grignard's reagent?
question_answer18) Which one has higher boiling point propane or ethanol?
question_answer19) Boiling points of which compound is highest
question_answer20) Alcohols art as weak acid. Why?
question_answer21) Arrange the following alcohols in order of increasing acidity
question_answer22) What is etherification?
question_answer23) Carboxylic acids or acid anhydride react With alcohol in presence of Why?
question_answer24) Which catalyst is required in the reaction of acid chloride with alcohol and why?
question_answer25) What is Lucas reagent?
question_answer26) Which type of alcohol does not react with Lucas reagent at room temperature?
question_answer27) What is the rate of reactivity of 1°, 2° and 3° alcohols with hydrogen halide?
question_answer28) What do you mean by dehydration?
question_answer29) What is the ease of dehydration of 1 °, 2° and 3° alcohols?
question_answer30) Explain dehydrogenation of alcohols.
question_answer31) What happens when primary alcohol is treated with acidified potassium permanganate?
question_answer32) What happens when a primary alcohol is treated with in anhydrous medium.
question_answer33) Complete the reaction
question_answer34) Suggest the product
question_answer35) What happens when t-alcohol is treated with high temperature?
question_answer36) What is wood spirit?
question_answer37) Which enzyme catalyses conversion of sucrose to ethanol?
question_answer38) What is the main use of ethanol?
question_answer39) Explain denaturation.
question_answer40) Which compound is mixed in ethanol for denaturation?
question_answer41) How are alcohols converted to carboxylic acids directly?
question_answer42) How will you obtain ketone from alcohol?
question_answer43) Which alcohol on oxidation gives aldehyde?
question_answer44) Which alcohol on oxidation gives ketone?
question_answer45) What are phenols?
question_answer46) What is the hybridisation of carbon linked with -OH group in phenol?
question_answer47) The C - O bond length in. phenol is less than that in methanol. Why?
question_answer48) What is carbolic acid?
question_answer49) What is cumene?
question_answer50) What happens when benzene sulphonic acid is fused with followed by hydrolysis?
question_answer51) What happens when benzene diazonium chloride is warmed with water?
question_answer52) Name the by-product of manufacture of phenol from cumene.
question_answer53) Boiling points of phenols are higher than corresponding aryl halide, ether or arenes of comparable molecular masses. Why?
question_answer54) Phenols are acidic. Why?
question_answer55) Write the reaction which indicates acidic nature of phenols.
question_answer56) What happens when phenol is heated with zinc?
question_answer57) What happens when phenol is oxidised by
question_answer58) Complete the reaction
question_answer59) Predict the product of the following reaction
question_answer60) What are ethers?
question_answer61) What are simple (Symmetrical) ethers? Give example.
question_answer62) What are mixed (Unsymmetrical) ethers? Give example.
question_answer63) What is the hybridisation of oxygen atom in ether?
question_answer64) bond angle in ethers (111.7°) is slightly larger than the tetrahedral angle. Why?
question_answer65) Predict the product (i) (ii)
question_answer66) Boiling points of ethers are much lower than that of alcohols. Why?
question_answer67) Ethers are soluble in water. Why?
question_answer68) What happens when dialkyl ether is heated with excess of hydrogen halide?
question_answer69) What is the order of reactivity of hydrogen halides (HX)
question_answer70) What product is obtained when ethers with two differ alkyl groups react with hydrogen halide?
question_answer71) What product is expected when alkyl aryl ethers are treat with HI?
question_answer72) What happens when t-butyl methyl ether is heated with HI?
question_answer73) What happens when anisole is treated with is
question_answer74) What happens when anisole reacts with a mixture of concentrated nitric acid and concentrated sulphuric acid?
question_answer75) Write the major products in the following reactions. (i) (ii)
question_answer76) Which catalyst is used in Friedel-Crafts reaction?
question_answer77) The bond angle in alcohol is slightly less than the tetrahedral angle. Why?
question_answer78) Boiling points of alcohols are higher than correspond in hydrocarbons, ethers and alkyl halides. Why?
question_answer79) Boiling points of alcohols decrease with increase it branching of carbon chains. Why?
question_answer80) Boiling points of ethanol is much higher than methoxy methane. Why?
question_answer81) Why are alcohols highly soluble in water?
question_answer82) Solubility of alcohols in water decreases with increasins size of alkyi group. Why?
question_answer83) Which reaction shows that alcohols are acidic in nature?
question_answer84) Sodium ethoxide is stronger base than NaOH. Illustrate.
question_answer85) Alcohols act as Bronsted acid and Bronsted base both Explain.
question_answer86) How is methanol manufactured?
question_answer87) What is the chief use of methanol?
question_answer88) Which alcohol is highly poisonous?
question_answer89) What is fermentation? How is ethanol manufactured by fermentation?
question_answer90) What is the advantage of using PCC for the oxidation of alcohols?
question_answer91) What happens when (i) Ethyl alcohol reacts with red P and . (ii) Ethanol is heated with cone.at 443 K.
question_answer92) Explain, cresols are less acidic than phenol.
question_answer93) o-and p-nitrophenols are stronger acids than phenols. Why?
question_answer94) m-nitrophenol is weaker acid than o-and p-nitrophenol. Why?
question_answer95) Phenols are more reactive than benzene towards electrophilic substitution reaction. Why?
question_answer96) Why are phenols o- and p- directing towards an electrophile?
question_answer97) o-nitrophenol is steam volatile while p-nitrophenol is not. a Why?
question_answer98) What happens when phenol is treated with in non aqueous solvents?
question_answer99) What happens when phenol is treated with bromine water?
question_answer100) Give an example of each of the following : (i) Kolbe's reaction. (ii) Reimer-Tiemann reaction.
question_answer101) Anisole undergoes bromination with bromine and ethanoic acid even in absence of iron bromide catalyst. Why?
question_answer102) In case of tertiary ethers the cleavage results in the formation tertiary halide. Explain.
question_answer103) How will you convert ethanol to ethoxy ethane?
question_answer104) What are the conditions for preparation of ethers from alcohols?
question_answer105) Why the dehydration reaction of alcohols to give ethers is mainly applicable to primary alcohols?
question_answer106) Why is it difficult to prepare ethyl methyl ether by dehydration of alcohols?
question_answer107) Explain Williamson's synthesis.
question_answer108) What are the advantages of Williamson's method.
question_answer109) Why is Williamson's synthesis not applicable to tertiary halides?
question_answer110) What happens when a tertiary halides heated with sodium alkoxide.
question_answer111) How is a tertiary ether obtained from an alkyl halide?
question_answer112) Chlorobenzene does not undergo substitution reaction easily Why?
question_answer113) How can you convert phenol into an alkylaryl ether?
question_answer114) Anisole on reaction with HI results in the formation of and not Why?
question_answer115) Discuss the site of cleavage in case of unsymmetrical ethers.
question_answer116) Why are ethers o-p directing?
question_answer117) Write the mechanism of hydration of alkene?
question_answer118) Explain hydro oration oxidation.
question_answer119) Complete the reactions : (i) (ii) (ii)
question_answer120) How are primary, secondary and tertiary alcohols distinguished?
question_answer121) What is aspirin? How is aspirin prepared?
question_answer122) Write the mechanism of dehydration.
question_answer123) What happens when the following alcohols are passed through red hot copper (i) (ii) (ii)
question_answer124) Tertiary alcohols are easiest to dehydrate, why?
question_answer125) How is phenol obtained from chlorobenzene?
question_answer126) How is phenol obtained from benzene?
question_answer127) How will you convert aniline to phenol?
question_answer128) How is phenol obtained from cumene?
question_answer129) Phenols are stronger acids than alcohols why?
question_answer130) Draw resonance structures of phenol.
question_answer131) Draw resonance structures of phenoxide ion.
question_answer132) How will you prepare picric acid from phenol?
question_answer133) Explain Reimer Tiemann reaction.
question_answer134) Explain Kolbe reaction.
question_answer135) What is denatured alcohol?
question_answer136) Why is fermentation carried out in absence of air?
question_answer137) What is the order of reactivity of alcohols in case of esterification?
question_answer138) Why does phenol give tribromo phenol on bromination with bromine water?
question_answer139) What is the use of Lewis acid in halogenation of phenols?
question_answer140) Explain the mechanism of cleavage of an unsymmetrical ether during its reaction with hydrogen iodide.
question_answer141) How does change in temperature affect the dehydration of alcohols?
question_answer142) Alcohols can act both as acids and bases. Explain.
question_answer143) Sodium metal cannot be used for drying alcohols. Assign reason.
question_answer144) Ethyl alcohol and dimethyl ether are isomeric but alcohol is a liquid at room temperature while ether is a gas. Explain.
question_answer145) At room temperature tertiary alcohols form white turbidity very fast with Lucas reagent while primary alcohols do not. Give reason.
question_answer146) Predict the product of the reaction between HBr and but-2-en-l-ol.
question_answer147) Hydration of 3-phenylbut-l-ene in dilute \[{{H}_{2}}S{{O}_{4}}\] forms 2-phenylbutan-2-ol and not 3-phenylbutan-2-ol. Why?
question_answer148) On reacting tertiary butyl alcohol and normal butyl alcohol separately with a few drops of dilute \[KMn{{O}_{4}},\]purple colour disappears and a brown precipitate is formed only in one case. Which of the two alcohols will respond to the reaction?
question_answer149) 3, 3-Dimethyl butan-2-ol loses a molecule of water in the presence of concentrated sulphuric acid to give tetramethylethylene as the major product. Suggest a suitable mechanism.
question_answer150) What is the structure of the major product when 3-Ethylpent-2-ene is reacted with \[Hg{{(OAc)}_{2}}/{{H}_{2}}O\,\,;\]\[NaB{{H}_{4}}\]?
question_answer151) p-nitrophenol is a stronger acid than phenol while p-cresol is a weaker acid. Discuss.
question_answer152) How do you account for the fact that unlike phenol, 2,4-dinitrophenol is soluble in aqueous sodium carbonate solution?
question_answer153) Alcohols react with halogen acids as well as phosphorus halides to form haloalkanes but phenols do not form haloarenes. Explain.
question_answer154) The order of reactivity of alcohols in the esterification reaction is : primary > secondary > tertiary. Justify.
question_answer155) Dehydration of alcohol to form an alkene is always carried out with concentrated \[{{H}_{2}}S{{O}_{4}}\] and not with concentrated\[HCl\] or \[HN{{O}_{3}}\]. Explain.
question_answer156) Phenol is acidic while cyclohexanol is neutral. Justify.
question_answer157) Phenol has a smaller dipole moment than methanol. Discuss.
question_answer158) o-nitrophenol is more acidic than o-methoxyphenol. Explain.
question_answer159) The compound \[{{C}_{4}}{{H}_{10}}O\] is produced on reaction of an alkane with \[{{H}_{2}}S{{O}_{4}}/{{H}_{2}}O\] which is not resolvable intooptical isomers. Identify the compound.
question_answer160) Which of the following is the most reactive towards attack by an electrophile?
question_answer161) What is the major product of the hydration of following alkenes? (i) \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} \,\,C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-CH=C{{H}_{2}}\] (ii) \[C{{H}_{3}}-\underset{{}}{\overset{\begin{smallmatrix} \,\,C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{CH}}}\,-C{{H}_{2}}-CH=C{{H}_{2}}\]
question_answer162) Why is cyclohexanol more soluble in water than hexan-1-ol?
question_answer163) How will you distinguish between \[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}OH\] and \[C{{H}_{3}}CH=CHC{{H}_{2}}OH\] by a chemical test?
question_answer164) Why can not anhydrous calcium chloride be used for drying ethyl alcohol?
question_answer165) What happens when propene is reacted with diborane and the product is hydrolysed with alkaline \[{{H}_{2}}{{O}_{2}}\]?
question_answer166) What happens when propan-1-ol is treated with ethanoic acid in the presence of concentrated \[{{H}_{2}}S{{O}_{4}}\]?
question_answer167) What happens when phenol is reacted with excess of bromine water?
question_answer168) How will you distinguish between allyl alcohol and n-propyl alcohol?
question_answer169) Give the product of reaction of ethyl alcohol with conc.\[{{H}_{2}}S{{O}_{4}}\] at (a) 0°C (b) room temperature (c) 130°C (d) \[{{180}^{\text{o}}}C\].
question_answer170) Give a simple chemical test to distinguish between: (i) Ethanol and dimethylether (ii) Pentan-1-ol and Pent-1-ene (iii) p-methylphenol and methoxybenzene.
question_answer171) Why is acid catalysed dehydration of tertiary butyl alcohol faster than that of n-butyl alcohol?
question_answer172) Unlike phenols, alcohols can be easily protonated. Explain
question_answer173) How will you distinguish between methanol and ethanol by colour test?
question_answer174) What is the function of anhydrous \[ZnC{{l}_{2}}\] in the Lucas test of alcohols?
question_answer175) Arrange following in decreasing order of boiling points and account for the order. Pentan-1-ol (A) 2-Methylbutan-2-ol (B) 3-Methylbutan-2-ol (C)
question_answer176) Predict in which of the following cases, the reaction with Lucas reagent will be immediate, slow or will not take place at all at room temperature? (a) (b) (c)
question_answer177) Outline the synthesis of the following alcohols from the indicated starting material (a) Isopropyl alcohol from propane (b) n-Butyl alcohol from ethyne.
question_answer178) Compare the relative acidic strengths of the following : (i) \[C{{H}_{3}}OH\] (ii)\[C{{H}_{3}}C{{H}_{2}}OH\] (iii)\[C{{H}_{3}}CH(OH)C{{H}_{3}}\] (iv)\[{{(C{{H}_{3}})}_{3}}COH.\]
question_answer179) What is the difference in the nature of alcohol when propene is subjected to acidic hydration or hydroboration oxidation?
question_answer180) Give the IUPAC names for each of the following compounds. (a) (b) (c) (d)
question_answer181) Arrange the following compounds in the increasing order of the property indicated against each. Give reasons for your answer. (i) \[C{{H}_{3}}C{{H}_{2}}OH,\,C{{F}_{3}}C{{H}_{2}}OH,\]\[CC{{l}_{3}}C{{H}_{2}}OH\]-Acid strength (ii) 2-methyl-2-propanol, 1-butanol and 2-butanol?Reactivity towards sodium.
question_answer182) Unlike phenols, alcohols are easily protonated. or Alcohols are easily protonated in comparison to phenols. or Why do phenols not give protonation reactions readily?
question_answer183) How do you account for the fact that unlike phenol, 2, 4-dinitrophenol and 2, 4, 6-trinitrophenol are soluble in aqueous sodium carbonate solution?
question_answer184) Alcohols react with halogen acids or phosphorus halides to form haloalkanes but phenols do not form halobenzenes. Explain.
question_answer185) Arrange the following alcohols in order of increasing reactivity towards Lucas reagent : 2-butanol, 1-butanol, 2-methyl-2-propanol
question_answer186) How will you distinguish between 1-phenylethanol and 2- phenylethanol?
question_answer187) (a) Give the mechanism of the following reaction \[2\,C{{H}_{3}}C{{H}_{2}}OH\xrightarrow[413\,K]{Dil.\,{{H}_{2}}S{{O}_{4}}}\,C{{H}_{3}}C{{H}_{2}}OC{{H}_{2}}C{{H}_{3}}\] Does this reaction follow \[{{S}_{N}}1\] or \[{{S}_{N}}2\] pathway? (b) Describe hydroboration-oxidation reaction with the help of an example.
question_answer188) Which is a stronger acid, phenol or cresol? Explain.
question_answer189) Name the reagents which are used in following conversions : (i) A primary alcohol to an aldehyde (ii) Butan-2-one to butan-2-ol (iii) Phenol to 2, 4, 6-tribromophenol.
question_answer190) Name the reagents and write the chemical equations for the preparation of the following compounds by Williamson synthesis. (i) Ethoxybenzene, (ii) 2-Methyl-2-methoxypropane
question_answer191) Identify the organic product obtained in the following reaction. 2, 3-Dimethylbutan-2-ol \[\xrightarrow{Conc.\,{{H}_{2}}S{{O}_{4}}}\]
question_answer192) Why \[{{(C{{H}_{3}})}_{3}}COH\] is less acidic than \[{{(C{{H}_{3}})}_{3}}SiOH\] although carbon is more electronegative than Si?
question_answer193) Identify the product of the following reaction : \[\underset{{}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ \,C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}-Br\xrightarrow[\Delta ]{EtOH}}}\,\]
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