Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.

2201.

An organic compound A reacts with sodium metal and forms B. On heating with conc. \[{{H}_{2}}S{{O}_{4}},\] A gives diethyl ether. A and B are            [AFMC 1998]

A.                 \[{{C}_{2}}{{H}_{5}}OH\] and \[{{C}_{2}}{{H}_{5}}ONa\]
B.                 \[{{C}_{3}}{{H}_{7}}OH\] and \[C{{H}_{3}}ONa\]
C.                 \[C{{H}_{3}}OH\] and \[C{{H}_{3}}ONa\]
D.                 \[{{C}_{4}}{{H}_{9}}OH\] and \[{{C}_{4}}{{H}_{9}}ONa\]
Answer» B.                 \[{{C}_{3}}{{H}_{7}}OH\] and \[C{{H}_{3}}ONa\]
2202.

Which statement is not correct about alcohol     [AFMC 1997]

A.                 Alcohol is lighter than water
B.                 Alcohol evaporates quickly
C.                 Alcohol of less no. of carbon atoms is less soluble in water than alcohol of high no. of carbon atoms
D.                 All of these
Answer» D.                 All of these
2203.

The order of stability of carbonium ions is             [MP PET 1996]

A.                 Methyl > ethyl > iso-propyl > tert-butyl
B.                 Tert-butyl > iso-propyl > ethyl > methyl
C.                 Iso-propyl > tert-butyl > ethyl > methyl
D.                 Tert-butyl > ethyl > iso-propyl > methyl
Answer» C.                 Iso-propyl > tert-butyl > ethyl > methyl
2204.

The reaction of \[{{C}_{2}}{{H}_{5}}OH\] with \[{{H}_{2}}S{{O}_{4}}\] does not give [MP PET 1996]

A.                 Ethylene             
B.                 Diethyl ether
C.                 Acetylene          
D.                 Ethyl hydrogen sulphate
Answer» D.                 Ethyl hydrogen sulphate
2205.

Sodium phenoxide reacts with \[C{{O}_{2}}\] at \[400K\] and 4-7 atm pressure to give   [MP PET 1996]

A.                 Sodium salicylate            
B.                 Salicylaldehyde
C.                 Catechol             
D.                 Benzoic acid
Answer» B.                 Salicylaldehyde
2206.

In \[C{{H}_{3}}C{{H}_{2}}OH\underset{{{350}^{o}}C}{\mathop{\xrightarrow{X}}}\,C{{H}_{2}}=C{{H}_{2}}+{{H}_{2}}O;\]  'X' is

A.                 NaCl     
B.                 \[CaC{{l}_{2}}\]
C.                 \[{{P}_{2}}{{O}_{5}}\]    
D.                 \[A{{l}_{2}}{{O}_{3}}\]
Answer» E.
2207.

Cresol has           [CPMT 2003]

A.                 Alcoholic ? \[OH\]           
B.                 Phenolic ? \[OH\]
C.                 ? \[COOH\]        
D.                 ? \[CHO\]
Answer» C.                 ? \[COOH\]        
2208.

The compound which gives the most stable carbonium on dehydration is             [MNR 1995]

A.                 \[\underset{\underset{C{{H}_{3}}\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}OH}}\,\]
B.                 \[\begin{matrix}    \,\,\,\,\,\,\,C{{H}_{3}}  \\    |  \\    C{{H}_{3}}-C-OH\,\,  \\    |  \\    \,\,\,\,\,\,C{{H}_{3}}  \\ \end{matrix}\]
C.                 \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\]
D.               \[\underset{\underset{OH\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}-C{{H}_{3}}}}\,\]
Answer» C.                 \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\]
2209.

Phenol is less acidic than               [MNR 1995]

A.                 Ethanol
B.                 Methanol
C.                 o-nitrophenol   
D.                 p-methylphenol
Answer» D.                 p-methylphenol
2210.

Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]

A.                 Fehling solution
B.                 Schiff's reagent
C.                 Sodium hydroxide and iodine    
D.                 Phthalein fusion test
Answer» D.                 Phthalein fusion test
2211.

During dehydration of alcohols to alkenes by heating with conc.\[{{H}_{2}}S{{O}_{4}}\] the initiation step is         [AIEEE 2003]

A.                 Protonation of alcohol molecule
B.                 Formation of carbocation
C.                 Elimination of water
D.                 Formation of an ester
Answer» B.                 Formation of carbocation
2212.

Which of the following product is formed, when ether is exposed to air [AIIMS 2000; RPMT 2002]

A.                 Oxide   
B.                 Alkanes
C.                 Alkenes               
D.                 Peroxide of diethyl ether            
Answer» E.
2213.

The compound ?A? when treated with ceric ammonium nitrate solution gives yellow ppt. The compound ?A? is [MP PET 2002]

A.                 Alcohol
B.                 Aldehyde
C.                 Acid      
D.                 Alkane
Answer» B.                 Aldehyde
2214.

The reaction of ethylene glycol with \[P{{I}_{3}}\]­gives [MP PMT 2000]

A.                 \[IC{{H}_{2}}C{{H}_{2}}I\]            
B.                 \[C{{H}_{2}}=C{{H}_{2}}\]
C.                 \[C{{H}_{2}}=CHI\]         
D.                 \[ICH=CHI\]
Answer» C.                 \[C{{H}_{2}}=CHI\]         
2215.

An unknown compound ?D?, first oxidised to aldehyde and then acitic acid by a dilute solution of\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]and\[{{H}_{2}}S{{O}_{4}}\]. The unknown compound ?D? is       [BHU 2000]

A.                 \[C{{H}_{3}}CHO\]          
B.                 \[C{{H}_{2}}C{{H}_{3}}OH\]
C.                 \[C{{H}_{3}}C{{H}_{2}}OH\]        
D.                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\]
Answer» D.                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\]
2216.

Reaction : \[C{{H}_{3}}OH+{{O}_{2}}\underset{Ag}{\mathop{\xrightarrow{{{600}^{0}}C}}}\,\]product The product is   [RPET 2000]

A.                 \[C{{H}_{2}}=C=O\]        
B.                 \[{{H}_{2}}C=O\]
C.                 \[{{C}_{2}}{{H}_{4}}\]    
D.                 \[{{C}_{2}}{{H}_{2}}\]
Answer» C.                 \[{{C}_{2}}{{H}_{4}}\]    
2217.

The boiling point of alcohol are ?. than corresponding thiols        [Pb. PMT 2000]

A.                 More    
B.                 Same
C.                 Either of these 
D.                 Less
Answer» B.                 Same
2218.

When Phenol is heated with phthalic anhydride in concentrated sulphuric acid and the hot reaction mixture is poured into a dilute solution of sodium hydroxide, the product formed is         [MP PET 1997, 2003; RPMT 1999; KCET (Med.) 2000; CPMT 1981; CBSE PMT 1988]

A.                 Alizarin
B.                 Methyl orange
C.                 Fluorescein        
D.                 Phenolphthalein
Answer» E.
2219.

\[C{{H}_{3}}-CH=CH-CH(OH)-C{{H}_{3}}\underset{\text{reagent}}{\mathop{\xrightarrow{\text{Jon }\!\!'\!\!\text{ s}}}}\,\]X,                 Product X is                        [RPET 2000]

A.                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CH(OH)C{{H}_{3}}\]
B.                 \[C{{H}_{3}}CH=CHCOC{{H}_{3}}\]
C.                 Both A and B are correct
D.                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COC{{H}_{3}}\]
Answer» C.                 Both A and B are correct
2220.

Boiling point of alcohol is comparatively higher than that corresponding alkane due to    [MH CET 2002]

A.                 Intermolecular hydrogen bonding
B.                 Intramolecular hydrogen bonding
C.                 Volatile nature
D.                 None of these  
Answer» B.                 Intramolecular hydrogen bonding
2221.

Which of the following statements is correct       [BHU 1997]

A.                 Phenol is less acidic than ethyl alcohol
B.                 Phenol is more acidic than ethyl alcohol
C.                 Phenol is more acidic than carboxylic acid
D.                 Phenol is more acidic than carbonic acid
Answer» C.                 Phenol is more acidic than carboxylic acid
2222.

The reagent which easily reacts with ethanol and propanol is [MP PET 1989]

A.                 Fehling solution               
B.                 Grignard reagent
C.                 Schiff's reagent
D.                 Tollen's reagent
Answer» C.                 Schiff's reagent
2223.

The alcohol that produces turbidity immediately with \[ZnC{{l}_{2}}+\] conc. HCl at room temperature [EAMCET 1997; MP PMT 1989, 99; IIT JEE 1981, 86; CBSE PMT 1989; CPMT 1989;MP PET 1997; JIPMER 1999]

A.                 1-hydroxybutane
B.                 2-hydroxybutane
C.                 2-hydroxy-2-methylpropane     
D.                 1-hydroxy-2-methylpropane
Answer» D.                 1-hydroxy-2-methylpropane
2224.

Propene is the product obtained by dehydrogenation of [KCET (Engg.) 2001]

A.                 2-propanol         
B.                 1-propanol
C.                 Propanal             
D.                 n-propyl alcohol
Answer» B.                 1-propanol
2225.

Which is not correct        [J & K 2005]

A.                 Phenol is more acidic than acetic acid
B.                 Ethanol is less acidic than phenol
C.                 Ethanol has lower boiling point than ethane
D.                 Ethyne is a non-linear molecule
Answer» B.                 Ethanol is less acidic than phenol
2226.

Reaction of phenol with chloroform/sodium hydroxide to give \[o\]-hydroxy benzaldehyde involves the formation of [J & K 2005]

A.                 Dichloro carbene             
B.                 Trichloro carbene
C.                 Chlorine atoms
D.                 Chlorine molecules
Answer» B.                 Trichloro carbene
2227.

In which of the following reactions carbon carbon bond formation takes place    [DPMT 2005]

A.                 Cannizzaro         
B.                 Reimer-Tiemann
C.                 HVZ reaction     
D.                 Schmidt reaction
Answer» C.                 HVZ reaction     
2228.

[DPMT 2005]

A.                
B.                
C.                
D.                                               
Answer» B.                
2229.

Tertiary butyl alcohol gives tertiary butyl chloride on treatment with       [Orissa JEE 2005]

A.                 Conc. \[HCl\]/anhydrous \[ZnC{{l}_{2}}\]
B.                 \[KCN\]
C.                 \[NaOCl\]
D.                 \[C{{l}_{2}}\]
Answer» B.                 \[KCN\]
2230.

Which of the following reaction is correctly represented [Orissa JEE 2005]

A.                
B.                
C.                                                       
D.                
Answer» B.                
2231.

Benzenediazonium chloride on reaction with phenol in weakly basic medium gives          [IIT-JEE 1998]

A.                 Diphenyl ether 
B.                 p-hydroxyazobenzene
C.                 Chlorobenzene                
D.                 Benzene
Answer» C.                 Chlorobenzene                
2232.

\[{{C}_{2}}{{H}_{5}}OH\] can be differentiated from \[C{{H}_{3}}OH\] by [MP PMT 1994]

A.                 Reaction with HCl            
B.                 Reaction with \[N{{H}_{3}}\]
C.                 By iodoform test             
D.                 By solubility in water
Answer» D.                 By solubility in water
2233.

A compound does not react with 2.4 di-nitrophenyl hydrazine and Na , compound is       [UPSEAT 2003]

A.                 Acetone              
B.                 Acetaldehyde
C.                 \[C{{H}_{3}}OH\]             
D.                 \[C{{H}_{2}}=CHOC{{H}_{3}}\]
Answer» E.
2234.

Which of the following compound is most acidic [BCECE 2005]

A.                 \[C{{H}_{4}}\]   
B.                 \[{{C}_{2}}{{H}_{6}}\]
C.                 \[CH\equiv CH\]              
D.                 \[{{C}_{2}}{{H}_{5}}OH\]
Answer» E.
2235.

The best method to prepare cyclohexene from cyclohexanol is by using                [IIT 2005]

A.                 Conc. HCl + ZnCl­2­             
B.  Conc. H3PO4
C.                 HBr        
D.                 Conc. HCl
Answer» C.                 HBr        
2236.

On reaction with hot conc. \[{{H}_{2}}S{{O}_{4}},\] which one of the following compounds loses a molecule of water [CPMT 1989]

A.                 \[C{{H}_{3}}COC{{H}_{3}}\]        
B.                 \[C{{H}_{3}}COOH\]
C.                 \[C{{H}_{3}}OC{{H}_{3}}\]           
D.                 \[C{{H}_{3}}C{{H}_{2}}OH\]
Answer» E.
2237.

\[A\underset{\Delta }{\mathop{\xleftarrow{Cu}}}\,C{{H}_{3}}C{{H}_{2}}OH\underset{\Delta }{\mathop{\xrightarrow{A{{l}_{2}}{{O}_{3}}}}}\,B.\] A and B respectively are \[\]              [RPMT/PET 2000]

A.                 Alkene, alkanal                
B.                 Alkyne, alkanal
C.                 Alkanal, alkene                
D.                 Alkene, alkyne
Answer» D.                 Alkene, alkyne
2238.

Which one of the following reactions would produce secondary alcohol [MP PET 1994]

A. \[\overset{\overset{\,\,O}{\mathop{\,\,\,||}}\,}{\mathop{{{C}_{6}}{{H}_{5}}CC{{H}_{3}}}}\,\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.C{{H}_{3}}MgBr}}}\,\]
B. \[\overset{\overset{\,\,O}{\mathop{\,\,\,||}}\,}{\mathop{{{C}_{6}}{{H}_{5}}CC{{H}_{3}}}}\,\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\]
C.                 \[C{{H}_{3}}CHO\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\]
D. \[\overset{\overset{O}{\mathop{||}}\,}{\mathop{C{{H}_{3}}CC{{H}_{3}}}}\,\underset{2.B{{r}_{2}}}{\mathop{\xrightarrow{1.O{{H}^{-}}}}}\,\]
Answer» C.                 \[C{{H}_{3}}CHO\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\]
2239.

Which will dehydrate easily         [Roorkee 1995]

A.                 3-methyl-2-butanol       
B.                 Ethyl alcohol
C.                 2-methyl propane-2-ol 
D.                 2-methyl butanol-2
Answer» E.
2240.

The dehydration of 2-methyl butanol with conc. \[{{H}_{2}}S{{O}_{4}}\] gives     [UPSEAT 2004]

A.                 2-methyl butene as major product
B.                 Pentene
C.                 2-methyl but-2-ene as major product
D.                 2-methyl pent-2-ene
Answer» B.                 Pentene
2241.

Isopropyl alcohol on oxidation forms [CPMT 1971, 81, 94; RPMT 2002]

A.                 Acetone              
B.                 Ether
C.                 Ethylene             
D.                 Acetaldehyde
Answer» B.                 Ether
2242.

What is formed when glycerol reacts with HI       [DCE 2002]

A.                 \[\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,HI\ \ \ \ \,}}}\,\]
B.                 \[\underset{C{{H}_{2}}I}{\overset{C{{H}_{2}}\ }{\mathop{\underset{|}{\overset{||}{\mathop{C}}}\,H\ \ }}}\,\]
C.                 \[\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,{{H}_{2}}}}}\,\]               
D.                 \[\underset{C{{H}_{3}}\ \ \ \ }{\overset{C{{H}_{2}}OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,=O\ \ }}}\,\]
Answer» C.                 \[\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,{{H}_{2}}}}}\,\]               
2243.

Which of the following can work as a dehydrating agent for alcohols        [BHU 1980]

A.                 \[{{H}_{2}}S{{O}_{4}}\] 
B.                 \[A{{l}_{2}}{{O}_{3}}\]
C.                 \[{{H}_{3}}P{{O}_{4}}\] 
D.                 All of these
Answer» E.
2244.

If there be a compound of the formula \[C{{H}_{3}}C{{(OH)}_{3}}\] which one of the following compounds would be obtained from it without reaction with any reagent         [CPMT 1983]

A.                 \[C{{H}_{3}}OH\]             
B.                 \[{{C}_{2}}{{H}_{5}}OH\]
C.                 \[C{{H}_{3}}COOH\]       
D.                 HCHO
Answer» D.                 HCHO
2245.

The adduct of the compound 'A' obtained by the reaction with excess of isopropyl magnesium iodide, upon hydrolysis gives a tertiary alcohol.  The compound 'A' is [MP PET 1985]

A.                 An ester              
B.                 A secondary alcohol
C.                 A primary alcohol            
D.                 An aldehyde
Answer» B.                 A secondary alcohol
2246.

Dehydration of 2-butanol yield  [Pb. CET 2004]

A.                 1-butene            
B.                 2-butene
C.                 2-butyne            
D.                 Both A and B
Answer» E.
2247.

When vapours of an alcohol are passed over hot reduced copper, alcohol is converted into alkene quickly, the alcohol is                [CPMT 1985]

A.                 Primary               
B.                 Secondary
C.                 Tertiary               
D.                 None of these
Answer» D.                 None of these
2248.

Fats, on alkaline hydrolysis, gives              [MH CET 2003]

A.                 Oils        
B.                 Soaps
C.                 Detergents        
D.                 Glycol + acid
Answer» C.                 Detergents        
2249.

Ethyl alcohol is heated with conc. \[{{H}_{2}}S{{O}_{4}}\]. The product formed is               [DCE 2004]

A.                 \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O{{C}_{2}}{{H}_{5}}\]            
B.                 \[{{C}_{2}}{{H}_{6}}\]
C.                 \[{{C}_{2}}{{H}_{4}}\]    
D.                 \[{{C}_{2}}{{H}_{2}}\]
Answer» B.                 \[{{C}_{2}}{{H}_{6}}\]
2250.

Which of the following is used as catalyst for preparing Grignard reagent              [Pb. CET 2002]

A.                 Iron powder      
B.                 Dry ether
C.                 Activated charcoal          
D.                 \[Mn{{O}_{2}}\]
Answer» C.                 Activated charcoal