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.

2051.

Which of the following is most acidic       [MP PMT 1995]

A.                 Formic acid        
B.                 Chloroacetic acid
C.                 Propionic acid   
D.                 Acetic acid
Answer» C.                 Propionic acid   
2052.

\[C{{H}_{3}}COOC{{H}_{3}}+\] excess \[PhMgBr\]\[\to \text{product}\xrightarrow{{{H}^{+}}}X\] The product \[X\] is        [Orissa JEE 2005]

A.                 1, 1-diphenylethanol
B.                 1, 1-diphenylmethanol
C.                 Methyl phenylethanol
D.                 Methyl phenylketone
Answer» B.                 1, 1-diphenylmethanol
2053.

Urea is a better fertilizer than ammonium sulphate because

A.                 It has greater percentage of nitrogen
B.                 It is more soluble
C.                 It is weakly basic
D.                 It does not produce acidity in soil
Answer» B.                 It is more soluble
2054.

The order of decreasing rate of reaction with ammonia is [Pb. PMT 1998]

A.                 Anhydrides, esters, ethers         
B.                 Anhydrides, ethers, esters
C.                 Ethers, anhydrides, esters          
D.                 Esters, ethers, anhydrides
Answer» C.                 Ethers, anhydrides, esters          
2055.

Which one of the following orders of acid strength is correct [CBSE PMT 2003]

A.                 \[RCOOH>HC\equiv CH>HOH>ROH\]
B.                 \[RCOOH\ >ROH\ >HOH\ >HC\equiv CH\]
C.                 \[RCOOH\ >HOH\ >ROH\ >HC\equiv CH\]
D.                 \[RCOOH\ >HOH\ >HC\equiv CH\ >ROH\]
Answer» D.                 \[RCOOH\ >HOH\ >HC\equiv CH\ >ROH\]
2056.

HCOOH shows all tests of aldehyde because       [CPMT 1996]

A.                 It has one aldehyde group
B.                 It is member of aldehyde
C.                 All acids show tests of aldehyde
D.                 Does not show any test
Answer» B.                 It is member of aldehyde
2057.

\[C{{H}_{2}}=CH-{{(C{{H}_{2}})}_{5}}COOH\underset{HBr}{\mathop{\xrightarrow{\text{Peroxide}}}}\,Z\]                 where Z is                                           [CPMT 1996]

A. \[\underset{\underset{Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-{{(C{{H}_{2}})}_{5}}COOH}}\,\]
B.                 \[BrC{{H}_{2}}-{{(C{{H}_{2}})}_{6}}COOH\]
C.                 \[C{{H}_{2}}=CH-{{(C{{H}_{2}})}_{5}}-C{{H}_{2}}OH\]
D.                 \[{{C}_{6}}{{H}_{5}}COOH\]
Answer» C.                 \[C{{H}_{2}}=CH-{{(C{{H}_{2}})}_{5}}-C{{H}_{2}}OH\]
2058.

Reduction of carboxylic acids gives

A.                 Alcohol with hydrogen in presence of palladium
B.                 Alcohol with \[LiAl{{H}_{4}}\]
C.                 Aldehyde with \[LiAl{{H}_{4}}\]
D.                 Alcohol with \[2HI(P)\]
Answer» C.                 Aldehyde with \[LiAl{{H}_{4}}\]
2059.

Name the end product in the following series of reactions                 \[C{{H}_{3}}COOH\xrightarrow{N{{H}_{3}}}A\underset{{{P}_{2}}{{O}_{5}}}{\mathop{\xrightarrow{\Delta }}}\,B\]                                [DPMT 1984]

A.                 \[C{{H}_{4}}\]   
B.                 \[C{{H}_{3}}OH\]
C.                 Acetonitrile       
D.                 Ammonium acetate
Answer» D.                 Ammonium acetate
2060.

Ethyl acetate at room temperature is a

A.                 Solid     
B.                 Liquid
C.                 Gas       
D.                 Solution
Answer» C.                 Gas       
2061.

Alkaline hydrolysis of esters is known as [CPMT 1986, 88, 93; MNR 1986; MP PET 1993]

A.                 Saponification  
B.                 Hydration
C.                 Esterification     
D.                 Alkalisation
Answer» B.                 Hydration
2062.

Which of the following would be expected to be most highly ionised in water                                     [AIIMS 1982]

A.                 \[C{{H}_{2}}ClC{{H}_{2}}C{{H}_{2}}COOH\]          
B.                 \[C{{H}_{3}}CHCl.C{{H}_{2}}.COOH\]
C.                 \[C{{H}_{3}}.C{{H}_{2}}.CC{{l}_{2}}.COOH\]         
D.                 \[C{{H}_{3}}.C{{H}_{2}}.CHCl.COOH\]
Answer» D.                 \[C{{H}_{3}}.C{{H}_{2}}.CHCl.COOH\]
2063.

When urea is heated, it forms biurette, alkaline solution of which forms ..... with \[CuS{{O}_{4}}\] solution          [AFMC 1980]

A.                 Violet colour     
B.                 Red colour
C.                 Green colour    
D.                 Black colour
Answer» B.                 Red colour
2064.

Which of the following compounds will evolve hydrogen on treatment with metal           [CPMT 1974]

A.                 \[{{C}_{2}}{{H}_{5}}OH\]              
B.                 \[C{{H}_{3}}COOH\]
C.                 A and B both     
D.                 None of these
Answer» D.                 None of these
2065.

What is the main reason for the fact that carboxylic acids can undergo ionization                 [MNR 1993; Pb. PMT 2004]

A.                 Absence of \[\alpha -\]hydrogen
B.                 Resonance stabilisation of the carboxylate ion
C.                 High reactivity of \[\alpha -\]hydrogen
D.                 Hydrogen bonding
Answer» C.                 High reactivity of \[\alpha -\]hydrogen
2066.

Benzoic acid has higher molecular weight in benzene and less in water because

A.                 Water has lower freezing point and higher boiling point than benzene
B.                 It dissociates to a greater extent in benzene than in water
C.                 It associates in water and dissociates in benzene
D.                 It dissociates in water and associates in benzene
Answer» E.
2067.

When acetic acid is dissolved in benzene its molecular mass [AFMC 1991]

A.                 Decreases
B.                 Increases
C.                 Either increases or decreases
D.                 Suffers no change
Answer» C.                 Either increases or decreases
2068.

Which of the following can possibly be used as analgesic without causing addiction and moon modification [CBSE PMT 1997]

A.                 Morphine
B.                 N-acetyl-para-aminophenol
C.                 Drazepom
D.                 Tetrahydrocatinol
Answer» C.                 Drazepom
2069.

Which of the following esters cannot undergo Claisen self condensation                                               [CBSE PMT 1998]

A.                 \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-COO{{C}_{2}}{{H}_{5}}\]
B.                 \[{{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}}\]
C.                 \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
D.                 \[{{C}_{6}}{{H}_{11}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
Answer» C.                 \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
2070.

In the precipitation of soap, which can be used instead of NaCl                                  [CPMT 1979]

A.                 Na         
B.                 \[C{{H}_{3}}COONa\]
C.                 \[N{{a}_{2}}S{{O}_{4}}\]              
D.                 Sodium silicate
Answer» D.                 Sodium silicate
2071.

\[C{{H}_{3}}C{{H}_{2}}COOH\xrightarrow{C{{l}_{2}}/Fe}X\underset{K{{O}_{4}}}{\mathop{\xrightarrow{Alcoholic}}}\,Y\] Compound Y is  [DPMT 1981; JIPMER 2000; AIEEE 2002]

A.                 \[C{{H}_{3}}C{{H}_{2}}OH\]        
B.                 \[C{{H}_{3}}C{{H}_{2}}CN\]
C.                 \[C{{H}_{2}}=CHCOOH\]              
D.                 \[C{{H}_{3}}CHClCOOH\]
Answer» D.                 \[C{{H}_{3}}CHClCOOH\]
2072.

Which acid is strongest or Which is most acidic [CPMT 1982, 89; BIT 1992; MP PET 1996; MP PMT/PET 1988; MP PMT 1995, 97;RPMT 1997]

A.                 \[C{{l}_{2}}CH.COOH\]  
B.                 \[ClC{{H}_{2}}COOH\]
C.                 \[C{{H}_{3}}COOH\]       
D.                 \[C{{l}_{3}}C.COOH\]
Answer» E.
2073.

The end product B in the sequence of reactions \[R-X\xrightarrow{C{{N}^{-}}}A\xrightarrow{NaOH}B\] is                              [CPMT 1985]

A.                 An alkane
B.                 A carboxylic acid
C.                 Sodium salt of carboxylic acid
D.                 A ketone
Answer» D.                 A ketone
2074.

A colourless water soluble organic liquid decomposes sodium carbonate and liberates carbon dioxide. It produces black precipitate with Tollen's reagent. The liquid is     [KCET 1989]

A.                 Acetaldehyde   
B.                 Acetic acid
C.                 Formaldehyde 
D.                 Formic acid
Answer» E.
2075.

Given below are some statements concerning formic acid, which of them is true              [CPMT 1983]

A.                 It is a weaker acid than acetic acid
B.                 It is a reducing agent
C.                 When its calcium salt is heated, it forms a ketone
D.                 It is an oxidising agent
Answer» C.                 When its calcium salt is heated, it forms a ketone
2076.

Which decolourises the colour of acidic \[KMn{{O}_{4}}\] [CPMT 1991]

A.                 \[C{{H}_{3}}COOH\]       
B.                 \[C{{H}_{3}}C{{H}_{2}}COOH\]
C.                 \[COOH.\,COOH\]          
D.                 \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]
Answer» D.                 \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]
2077.

Formic acid                                         [MP PET/PMT 1988]

A.                 Is immiscible with water
B.                 Reduces the ammonical silver nitrate
C.                 Is a weak acid nearly three and a half time weaker than acetic acid
D.                 Is prepared by heating potassium hydroxide
Answer» C.                 Is a weak acid nearly three and a half time weaker than acetic acid
2078.

\[C{{H}_{3}}COOH\underset{{{P}_{2}}{{O}_{5}}}{\mathop{\xrightarrow{\Delta }}}\,X\]. Identify X            [JIPMER 2000; CPMT 2003]

A.                 \[C{{H}_{3}}COC{{H}_{3}}\]        
B.                 \[C{{H}_{3}}CHO\]
C.                 \[{{(C{{H}_{3}}CO)}_{2}}O\]       
D.                 \[C{{H}_{4}}\]
Answer» D.                 \[C{{H}_{4}}\]
2079.

The acid showing salt-like character in aqueous solution is [MP PET/PMT 1998]

A.                 Acetic acid          
B.                 Benzoic acid
C.                 Formic acid        
D.                 \[\alpha -\]amino acetic acid
Answer» E.
2080.

In the presence of iodine catalyst, chlorine reacts with acetic acid to form                                             [MP PMT 1997]

A.                 \[\overset{\overset{\,\,\,\,O}{\mathop{\,\,\,\,\,||}}\,}{\mathop{C{{H}_{3}}-C-Cl}}\,\] 
B.                 \[\overset{\overset{\,\,\,\,\,\,O}{\mathop{\,\,\,\,\,\,\,\,\,||}}\,}{\mathop{C{{H}_{2}}Cl-C-OH}}\,\]
C. \[\overset{\overset{\,\,\,Cl}{\mathop{\,\,|}}\,}{\mathop{\underset{\underset{\,\,Cl}{\mathop{\,\,\,|}}\,}{\mathop{C{{H}_{3}}-C-OH}}\,}}\,\]   
D.                 \[\overset{\overset{O\,\,}{\mathop{||\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-C-O-Cl}}\,\]
Answer» C. \[\overset{\overset{\,\,\,Cl}{\mathop{\,\,|}}\,}{\mathop{\underset{\underset{\,\,Cl}{\mathop{\,\,\,|}}\,}{\mathop{C{{H}_{3}}-C-OH}}\,}}\,\]   
2081.

The reaction                 \[2C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-O{{C}_{2}}{{H}_{5}}\xrightarrow{{{C}_{2}}{{H}_{5}}ONa}}}\,\]\[C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{2}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-O{{C}_{2}}{{H}_{5}}+{{C}_{2}}{{H}_{5}}OH\]                 is called                [MP PMT 2003; KCET 1996]

A. Etard reaction   
B. Perkin's reaction
C. Claisen condensation    
D. Claisen Schmidt reaction
Answer» D. Claisen Schmidt reaction
2082.

Which is the strongest acid? (pKa value is given in the bracket)  [MP PMT 1997; BHU 2003]

A.                 \[HCOOH\,(3.77)\]         
B.                 \[{{C}_{6}}{{H}_{5}}COOH\,(4.22)\]
C.                 \[C{{H}_{3}}COOH\,(4.71)\]        
D.                 \[C{{H}_{3}}C{{H}_{2}}COOH\,(4.88)\]
Answer» B.                 \[{{C}_{6}}{{H}_{5}}COOH\,(4.22)\]
2083.

The vapour of a carboxylic acid HA when passed over \[Mn{{O}_{2}}\] at 573 K yields propanone. The acid HA is

A.                 Methanoic acid
B.                 Ethanoic acid
C.                 Propanoic acid  
D.                 Butanoic acid
Answer» C.                 Propanoic acid  
2084.

Acetic acid dissolved in benzene shows a molecular mass of        [MP PET 1993]

A.                 30          
B.                 60
C.                 120        
D.                 240
Answer» D.                 240
2085.

Which of the following compounds will react with \[NaHC{{O}_{3}}\] solution to give sodium salt and carbon dioxide [CBSE PMT 1999; BHU 1983, 2002]

A.                 Phenol 
B.                 n-hexanol
C.                 Acetic acid          
D.                 Both A and B
Answer» D.                 Both A and B
2086.

Acetic acid exists as a dimer in benzene solution. This is due to   [MP PMT 1989; CPMT 1982]

A.                 Condensation
B.                 Presence of \[-COOH\] group
C.                 Presence of \[\alpha -\]hydrogen
D.                 Hydrogen bonding
Answer» E.
2087.

Ester and acetamide are distinguished by             [BHU 1996]

A.                 Hydrolysis with strong acids or alkali
B.                 Derivatives of fatty acids
C.                 Both A and B
D.                 None of these
Answer» D.                 None of these
2088.

Formaldehyde and formic acid can be distinguished using [AFMC 1993]

A.                 Tollen's reagent               
B.                 Fehling solution
C.                 Ferric chloride  
D.                 Sodium bicarbonate
Answer» E.
2089.

Reaction of ethyl formate with excess of \[C{{H}_{3}}MgI\] followed by hydrolysis gives               [IIT (Screening) 1992]

A.                 n-propyl alcohol              
B.                 Ethanal
C.                 Propanal             
D.                 Isopropyl alcohol
Answer» E.
2090.

In the reaction                 \[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}(A)\xrightarrow{{{I}_{2}}+NaOH}(B)\xrightarrow{Ag\text{(Dust)}}(C)\]                 the final product C is

A.                 \[{{C}_{2}}{{H}_{5}}I\]   
B.                 \[{{C}_{2}}{{H}_{5}}OH\]
C.                 \[{{C}_{2}}{{H}_{2}}\]    
D.                 \[C{{H}_{3}}COC{{H}_{3}}\]
Answer» D.                 \[C{{H}_{3}}COC{{H}_{3}}\]
2091.

Hydrolytic reaction of fats with caustic soda is known as [MP PMT/PET 1988; AMU 1988; KCET 2000; MP PET 2001]

A.                 Esterification     
B.                 Saponification
C.                 Acetylation        
D.                 Carboxylation
Answer» C.                 Acetylation        
2092.

In the following sequence of reactions, what is D                          [UPSEAT 2002]

A.                 Primary amine
B.                 An amide
C.                 Phenyl isocyanate
D.                 A chain lengthened hydrocarbon
Answer» D.                 A chain lengthened hydrocarbon
2093.

In \[C{{H}_{3}}COOH\] and HCOOH, HCOOH will be [CPMT 1975; DPMT 1982]

A.                 Less acidic          
B.                 Equally acidic
C.                 More acidic        
D.                 None
Answer» D.                 None
2094.

Which does not give silver mirror with ammoniacal \[AgN{{O}_{3}}\] [MP PET 1992]

A.                 HCHO   
B.                 \[C{{H}_{3}}CHO\]
C.                 \[C{{H}_{3}}COOH\]       
D.                 HCOOH
Answer» D.                 HCOOH
2095.

Acetic acid is weak acid than sulphuric acid because [CPMT 2003]

A. It decompose on increasing temperature
B. It has less degree of ionisation  
C. It has -COOH group                      
D. None of these
Answer» C. It has -COOH group                      
2096.

Which one is strongest acid         [MP PMT 1992]

A.                 \[C{{H}_{2}}FCOOH\]    
B.                 \[C{{H}_{2}}ClCOOH\]
C.                 \[CHC{{l}_{2}}COOH\]   
D.                 \[CH{{F}_{2}}COOH\]
Answer» E.
2097.

Sulphonation of benzoic acid produces mainly    [CPMT 1982]

A.                 o-sulphobenzoic acid
B.                 m-sulphobenzoic acid
C.                 p-sulphobenzoic acid    
D.                 o- and p-sulphobenzoic acid
Answer» C.                 p-sulphobenzoic acid    
2098.

The reaction of HCOOH with conc. \[{{H}_{2}}S{{O}_{4}}\] gives [DPMT 1982, CPMT 1989; MP PET 1995; AIIMS 2000; Manipal 2001; Pb. CET 2002 ]

A.                 \[C{{O}_{2}}\]   
B.                 CO
C.                 Oxalic acid          
D.                 Acetic acid
Answer» C.                 Oxalic acid          
2099.

Which of the following reduces Tollen's reagent [MP PMT 1991]

A.                 Acetic acid          
B.                 Citric acid
C.                 Oxalic acid          
D.                 Formic acid
Answer» E.
2100.

What is obtained, when propene is treated with N­-bromo succinimide                                  [MP PMT 2003]

A.                 \[C{{H}_{3}}-\underset{\,\,}{\mathop{\underset{\underset{\,Br}{\mathop{|}}\,}{\mathop{C}}\,=C{{H}_{2}}\ \ }}\,\]     
B.                 \[BrC{{H}_{2}}-CH=C{{H}_{2}}\]
C.                 \[BrC{{H}_{2}}-CH=CHBr\]           
D.                 \[BrC{{H}_{2}}-\underset{\underset{Br}{\mathop{|\,\,\,\,}}\,}{\mathop{CH}}\,-C{{H}_{2}}Br\]
Answer» C.                 \[BrC{{H}_{2}}-CH=CHBr\]