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MDCAT Chemistry Chapter 16 Alcohols and Phenols Online Test MCQs With Answers
Question # 1
The conversion of tertiary alcohols into alkenes in the presence of K2Cr2O7 + H2SO4 is
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Addition reaction
C-H bond cleavage
Elimination reaction
Combustion reaction
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Question # 2
Alcohol is less acidie than phenol due to
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higher ka value
Instability of alkoxide ion
stability of carbocation
Stability of phenol
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Question # 3
The oxidation of 1 - propanol in the presence of H2SO4, +K2Cr207 produces final product
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Acetaldehyde
Propanal
Acetone
Propanoic acic
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Question # 4
The acidity of phenol is due to its
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Nature of Benzene
Double bond in benzene ring
Natute of phenoxide ion
Hydroxyl group
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Question # 5
What forces operate between ethyl group of ethyl alcohol and oxygen of water
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H-bonding
attractive forces
repulsive forces
dipole forces
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Question # 6
Which one of the followings is resistant to oxidation under normal conditions
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Methyl alcohol
Acetaldehyde
Ethyl alcohol
Acetone
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Question # 7
Which one of the following is more acidic
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Phenol
Carboxylic acid
Alcohols
Amines
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Question # 8
In aldehydes and ketones carbon of carbonyl group is;
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sp³ hyhridized
sp² hybridized
sp hybridized
un hybridized
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Question # 9
Esterification of CH3COOH isreaction
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Acid base
Electrophilic
Redox
Nucleophilic
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Question # 10
In the transition state of S2 mechanism reaction with alkyl halides, which of the following orbital hybridization is involved
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sp³
sp
sp²
dsp³
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Question # 11
Which is an intermediate in Svl
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Ethoxide ion
Alkene
Alkyl halide
Carbocation
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Question # 12
SN2-reactions can be usually observed in
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Primary alkylı halide
secondary alkyl halide
Tertiary alkyl halide
Both A. and B
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Question # 13
In elimination reaction i.e, in the formation of alkene, the reactivity of alkyl halide is in the order:
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CI>Br>I
I>Br>Cl
Br>CI>I
I>CI> Br
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Question # 14
A mixture of 1-chloropropane and 2-chloro-propane when treated with alcoholic KOH, gives
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Prop-2-ene
Isopropy lene
Propene
A mixture of prop-l-ene
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Question # 15
CH3CH2CH2OH--------A---------B Here B is
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Propyne
Propanal
Propene
Propane
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Question # 16
The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives
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Ethene
Alcohol
Diethyl ether
Carboxylic acid
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Question # 17
The starting substance for the preparation of iodoform is any of the following, except
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СН3СН(ОН)CН3
CH3CH2ОН
HCH2OH
CH3COCH3
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Question # 18
What is true about an alcohol and phenol
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Both are more acidic than water
Both react with NaOH
Both produce CO2 with Na2CO3
Both, produce H2 with Na
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Question # 19
The alkaline hydrolysis of bromoethane shown below gives alcohol as the product: H3C-CH2-Br-------H3C-CH2-OH
The reagent and the condition used in this reaction may be:
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H20 at room temperature
KOH in alcohol
Ethanol. heat
Dilute NaOH(aq) warm
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Question # 20
Correct statement about Nucleophilic substitution bimolecular is
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Transition state is formed
Inversion take place
It is two step reacticn
Both a &c
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Question # 21
Reactivity of carbonyl compounds is due to
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Electrophilic carbon
Less stearic hindrance
Unsaturation of Co
Polarity of bond
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