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NEET Chemistry MCQ
Alcohols, Phenols And Ethers Mcq Neet Chemistry
Quiz 7
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Q.1
Wood spirit is ... ..
0%
a) Methyl alcohol
0%
b) Ethyl alcohol
0%
c) Benzene
0%
d) None of these
Explanation
Answer : (a)
Q.2
Ethylene glycol on oxidation with per-iodic acid gives ....
0%
a) formaldehyde
0%
b) glyoxal
0%
c) Oxalic acid
0%
d) glycollic acid
Explanation
Answer : (a)
Q.3
Which will not form a yellow precipitate on heating with an alkaline solution of iodine?
0%
a) CH3CHOHCH3
0%
b) CH3OH
0%
c) CH3CH2CHOHCH3
0%
d) CH3CH2OH
Explanation
Compound with units attached with H or C gives iodoform reaction Answer : (b)
Q.4
In the reaction involbing C - OH bond, in alcohols the order of reactivity is ... ....
0%
a) 1° > 2° > 3°
0%
b) 3° > 2° > 1°
0%
c) 2° > 3° > 1°
0%
d) non of these
Explanation
Reactivity order of OH towards Lucas reagent is as per option 'b' Answer : (b)
Q.5
Which one among the following is Williamson's synthesis?
0%
a) C2H5I + C2H5ONa → C2H5 . O .C2H5 + NaI
0%
b) HCHO + NaOH → HCOONa + CH3OH
0%
c)
0%
d)
Explanation
Williamson's synthesis is used for the preparation of ethers; specially mixed ethers. Answer : (a)
Q.6
on Q187) The end product of the reaction ... ..
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a) alkane
0%
b) sodium salt of carboxylic acid
0%
c) ketone
0%
d) carboxylic acid
Explanation
Answer : (b)
Q.7
For which pair iodoform test cannot be used as distinction test?
0%
a) Propanol-1 and propanol-2
0%
b) pentanol-1 and pentanol-3
0%
c) Butanol-2 and 2-methyl propan-2-ol
0%
d) Pentanol-1 and pentanol-3
Explanation
The molecule should contain units attached to C or H in it to show iodoform reaction Answer : (d)
Q.8
on Q189) Consider the following reaction
0%
a) CH3-CH2-O-SO3H
0%
b) CH2-CH2
0%
c) CH3CH2OH
0%
d) CH3CH2-O-CH2CH3
Explanation
X is CH3Br, Y is CH3CHO and Z is CH3CH2OH Answer : (c)
Q.9
Glycerol is present as a triester in .... ...
0%
a) vegetable oil and fats
0%
b) naphtha
0%
c) petroleum
0%
d) kerosene oil
Explanation
Answer : (a)
Q.10
The red coloured compound formed during Viktor Meyer's test for ethanol is ......
0%
a) CH3CH2NOH
0%
b)
0%
c)
0%
d) none of these
Explanation
Anion of nitrolic acid is red coloured Answer : (b)
Q.11
han One Correct Answer Which give(s) colour(s) with FeCl3?
0%
a)
0%
b)
0%
c)
0%
d)
Explanation
Answer : (a, b and d)
Q.12
Phenol on sulphonation gives .... ....
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a) o-phenol sulphonic acid
0%
b)p-phenol sulphonic acid
0%
c) m-phenol sulphonic acid
0%
d) mixture of o- and p-phenol sulphonic acid
Explanation
- OH group is o- and p-directive Answer : (d)
Q.13
Which of the following alcohol is made by fermentation?
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a) Ethanol
0%
b) Methanol
0%
c) Propanol
0%
d) Glycerol
Explanation
Answer : (a)
Q.14
One conversion into the Grignard reagent followed by treatment with absolute ethanol, how many isomeric alkyl chlorides would yield 2-methylbutane?
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a) 2
0%
b) 3
0%
c) 4
0%
d) 5
Explanation
given that RH is (CH3)2CH.CH2CH3 Thus RX wold be (CH3)2CH.CH2CH2 Cl Along with possible three isomers. In each case Grignard reagent formed will give 2-methylbutane on reaction with C2H5OH Answer : (c)
Q.15
han One Correct Answer Q196) The compound(s) used for the denaturation of ethyl alcohol is/are
0%
a) anhydrous calcium chloride
0%
b) methyl alcohol
0%
c) pyridine
0%
d) naphtha
Explanation
Answer : (b, c and d )
Q.16
Terylene is formed by the reaction of one of the following alcohols .... ...
0%
a) 1,2,3-propanetriol
0%
b) 2-Chloroethanol
0%
c) phenol
0%
d) ethanediol
Explanation
Terylene is formed by the action of glycol or ethane diol on dimethyl terephalate Answer : (d)
Q.17
R-CH=CH2 reacts with B2H6 in presence of H2O2 to give
0%
a) RCOCH3
0%
b) RCHOHCH2OH
0%
c) RCH2CH2OH
0%
d) RCH2CHO
Explanation
Answer : (c)
Q.18
Increasing order of acid strength among p-methoxyphenol, p-methylphenol and p-nitrophenol is
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a) p-methylphenol < p-methoxyphenol < p-nitrophenol
0%
b) p-methoxyphenol < p-methylphenol < p-nitrophenol
0%
c) p-nitrophenol < p-methoxyphenol < p-methylphenol
0%
d) p-nitrophenol < p-methylphenol < p-methoxyphenol
Explanation
Answer : (b)
Q.19
Alcohol may behave as .... ..
0%
a) neutral
0%
b) Lewis base
0%
c) Bronsted acid
0%
d) all of these
Explanation
Alcohols are neutral as they do not influence the pH. DUe to O-H bond, they possess Bronsted acid nature showing cleavage of O-H bond. Also due to the presence of lone pair of electron on oxygen atom, they act as Lewis base. The reactivity order is based on +IE of alkyl groups. Lewis base order : 3° > 2° > 1° Bronsted acid order : 1° > 2° > 3° Answer : (d)
Q.20
Which of the following statements is wrong in case of ethoxyethane?
0%
a) Its dipole moment is zero
0%
b) It is used as anaesthetic
0%
c) It is soluble in conc. H2SO4
0%
d) It is inflammable
Explanation
Answer : (a)
Q.21
Increasing order of acid strength among tert-butanol, isopropanol and ethanol is
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a) ethanol, isopropanol, tert-butanol
0%
b) tert-butanol, isopropanol, ethanol
0%
c) isopropanol, tert-butanol, ethanol
0%
d) tert-butanol, ethanol, isopropanol
Explanation
reaction involving H-atom of alcohol show the order 1° > 2° > 3° Answer : (b)
Q.22
Ethyl alcohol is denatured by adding ... ...
0%
a) KCN
0%
b) CH3OH and pyridine
0%
c) CH3OH and C6H6
0%
d) methanol and formic acid
Explanation
Answer : (b)
Q.23
Ethylene oxide when, treated with Grignard reagent yields .... ....
0%
a) primary alcohol
0%
b) secondary
0%
c) tertiary alcohol
0%
d) cyclopropyl alcohol
Explanation
Answer : (a)
Q.24
Methylated spirit is ... ...
0%
d) 95% methanol
0%
a) methanol containing some pyridine
0%
b) ethanol containing some methanol
0%
c) pure methanol
Explanation
Ethyl alcohol is mixed with methyl alcohol to denaturate it in order to prevent its use for drinking purpose Answer : (b)
Q.25
Which of the following groups will increase the acedic nature of phenol?
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a) -NO2
0%
b) -CN
0%
c) -X(halogen)
0%
d) All of the above
Explanation
Answer : (d)
Q.26
Oxidation of 2-propanol by K2Cr2O7 and dilute H2SO4 leads to the formation of ... ....
0%
a) propanoic acid
0%
b) propanal
0%
c) methanoic acid
0%
d) propanone
Explanation
Secondary alcohol on oxidation gives ketone and further oxidation gives acid with one carbon less Answer : (d)
Q.27
Fusel oil is mixture of .... ....
0%
a) ethers
0%
b) alcohols
0%
c) ethers and alcohols
0%
d) alcohols and acetone
Explanation
Fusel oil is a mixture of pentanol and butanol with other organic substances Answer : (b)
Q.28
Glycerol on oxidation with Fenton's reagent produces ... ...
0%
a) glyceraldehyde and dihydroxy acetone
0%
b) glyceraldehyde
0%
c) tartonic acid
0%
d) dihydroxy acetone
Explanation
Answer : (a)
Q.29
The most important ingredient of dynamite is .... ....
0%
a) nitrobenzene
0%
b) glycerine trinitrate
0%
c) nitroaniline
0%
d) nitrosobenzene
Explanation
Answer : (b)
Q.30
han One Correct Answer Q211) Phenol react with ferric chloride solution to give
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a) blue colouration
0%
b) purple colouration
0%
c) green colouration
0%
d) none of these
Explanation
Answer : (a,b,c)
0 h : 0 m : 1 s
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