NEET Chemistry Alcohols,Phenols and Ethers Questions Solved


Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

(a) CH3CH(OH)CH3                                  (b) CH3CH2CH(OH)CH3

(c) CH3OH                                               (d) CH3CH2OH

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n-propyl alcohol and iso-propyl alcohol can be chemically distinguished by which reagent 

(a) PCl5

(b) reduction

(c) oxidation with potassium dichromate

(d) ozonolysis

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Among the following sets of reactants which one produces anisole?                           

(a) CH3CHO, RMgX

(b) C6H5OH, NaOH, CH3I

(c) C6H5OH, neutral FeCl3

(d) C6H5-CH3, CH3COCl, AlCl3

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Consider the following reaction,

EthanolPBr3Al.KOH Y (ii) H2O, heat(i) H2SO4, room temperatureZ                                

The product Z is

(a) CH2=CH2

(b) CH3CH2OCH2CH3

(c) CH3CH2OSO3H

(d) CH3CH2OH

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In the following sequence of reactions,

CH3-BrKCNAH3O+BetherLiAlH4C

the end product C is 

(a) acetone                    (b) methane

(c) acetaldehyde            (d) ethyl alcohol

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Which one is formed when sodium phenoxide is heated with ethyl iodide?              

(a) Phenetole

(b) Ethyl phenyl alcohol

(c) Phenol

(d) None of the above

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Identity Z in the sequence of reactions,                                         

CH3CH2CH=CH2 HBr/H2O2YC2H5ONaZ

(a) CH3-(CH2)3-O-CH2CH3

(b) (CH3)2CH2-O-CH2CH3

(c) CH3(CH2)4-O-CH3

(d) CH3CH2-CH(CH3)-O-CH2CH3

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Reaction of ethyl formate with excess of CH3MgI followed by hydrolysis gives

(1) n-propyl alcohol                  (2) ethanol              (3) isopropyl alcohol              (4)  propanal

 

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Ethylene oxide when treated with Grignard reagent yields                                              

(a) secondary alcohol                                 (b) tertiary alcohol

(c) cyclopropyl alcohol                                (d) primary alcohol

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In a reaction, 

CH2=CH2acidHypochlorousMR

M=molecules, R=reagent. M and R are 

(a) CH3CH2Cl and NaOH

(b) CH2Cl. CH2OH and aq. NaHCO3

(c) CH3CH2OH and HCl

(d)  and heat

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