-
question_answer1)
Identify the reactant X and the product Y \[C{{H}_{3}}-CO-C{{H}_{3}}+X\to \underset{{}}{\mathop{{{(C{{H}_{3}})}_{3}}}}\,C-OMg-Cl\]
\[Y+Mg\ (OH)\ Cl\] [Kerala PMT 2003]
A)
\[X=MgC{{l}_{2}};\ \ Y=C{{H}_{3}}CH=C{{H}_{2}}\] done
clear
B)
\[X=C{{H}_{3}}MgCl;\ Y={{C}_{2}}{{H}_{5}}COC{{H}_{3}}\] done
clear
C)
\[X=C{{H}_{3}}MgCl;\ Y={{(C{{H}_{3}})}_{3}}\ C-OH\] done
clear
D)
\[X={{C}_{2}}{{H}_{5}}MgCl;\,Y={{(C{{H}_{3}})}_{3}}C-OH\] done
clear
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question_answer2)
When m-chlorobenzaldehyde is treated with 50% KOH solution, the product (s) obtained is (are) [CBSE PMT 2003]
A)
B)
C)
D)
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question_answer3)
A and B in the following reactions are \[R-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-{R}'\underset{KCN}{\mathop{\xrightarrow{HCN}}}\,A\xrightarrow{B}\begin{matrix} R \\ R \\ \end{matrix}\,>C<\begin{array}{*{35}{l}} OH \\ C{{H}_{2}}N{{H}_{2}} \\ \end{array}\] [CBSE PMT 2003]
A)
\[A=RR'C<\begin{matrix} CN \\ OH \\ \end{matrix},B-LiAl{{H}_{4}}\] done
clear
B)
\[A=RR'C<\begin{array}{*{35}{l}} OH \\ COOH \\ \end{array},\,\,B-N{{H}_{3}}\] done
clear
C)
\[A=RR'C<\begin{matrix} CN \\ OH \\ \end{matrix}\ ,B={{H}_{3}}{{O}^{\oplus }}\] done
clear
D)
\[A=RR'C{{H}_{2}}CN,B=NaOH\] done
clear
View Solution play_arrow
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question_answer4)
Reduction of Aldehydes and Ketones to hydrocarbon take place in the presence of [CPMT 2003]
A)
Zn amalgam and HCl acid done
clear
B)
\[Pd/BaS{{O}_{4}}\] done
clear
C)
Anhydrous \[AlC{{l}_{3}}\] done
clear
D)
Ni/Pt done
clear
View Solution play_arrow
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question_answer5)
Reduction of \[>C=O\] to \[C{{H}_{2}}\] can be carried out with [DCE 2000]
A)
Catalytic reduction done
clear
B)
\[Na/{{C}_{2}}{{H}_{5}}OH\] done
clear
C)
Wolf-Kischner reduction done
clear
D)
\[LiAl{{H}_{4}}\] done
clear
View Solution play_arrow
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question_answer6)
For \[{{C}_{6}}{{H}_{5}}CHO\] which of the following is incorrect [CPMT 1985]
A)
On oxidation it yields benzoic acid done
clear
B)
It is used in perfumery done
clear
C)
It is an aromatic aldehyde done
clear
D)
On reduction yields phenol done
clear
View Solution play_arrow
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question_answer7)
Grignard reagent on reaction with acetone forms [BHU 1995; RPMT 2002; Roorkee 1990]
A)
Tertiary alcohol done
clear
B)
Secondary alcohol done
clear
C)
Acetic acid done
clear
D)
Acetaldehyde done
clear
View Solution play_arrow
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question_answer8)
Which of the following is incorrect [CBSE PMT 2001]
A)
\[FeC{{l}_{3}}\] is used in the detection of phenols done
clear
B)
Fehling solution is used in the detection of glucose done
clear
C)
Tollen's reagent is used in detection of unsaturation done
clear
D)
\[NaHS{{O}_{3}}\] is used in the detection of carbonyl compounds done
clear
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question_answer9)
Consider the following statement Acetophenone can be prepared by (1) Oxidation of 1-phenylethanol (2) Reaction of benzalthanol with methyl magnesium bromide (3) Friedel craft?s reaction of benzene with acetyl chloride (4) Distillation of calcium benzoate [SCRA 2001]
A)
1 and 2 done
clear
B)
1 and 4 done
clear
C)
1 and 3 done
clear
D)
3 and 4 done
clear
View Solution play_arrow
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question_answer10)
Which one of the following pairs is not correctly matched [SCRA 2001]
A)
\[>C=O\xrightarrow{\text{Clemenson }\!\!'\!\!\text{ s reduction}}>C{{H}_{2}}\] done
clear
B)
\[>C=O\xrightarrow{\text{Wolf -Kishner reduction}}>CHOH\] done
clear
C)
\[-COCl\xrightarrow{\text{Rosenmund }\!\!'\!\!\text{ s reduction}}CHO\] done
clear
D)
\[-C\equiv N\xrightarrow{\text{Stephen reduction}}CHO\] done
clear
View Solution play_arrow
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question_answer11)
Which of the following gives aldol condensation reaction [CPMT 2001]
A)
\[{{C}_{6}}{{H}_{5}}OH\] done
clear
B)
\[{{C}_{6}}{{H}_{5}}-\overset{O\,\,}{\mathop{\overset{||\,\,\,}{\mathop{C-}}\,}}\,{{C}_{6}}{{H}_{5}}\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}-\overset{O\,\,}{\mathop{\overset{||\,\,\,}{\mathop{C-}}\,}}\,C{{H}_{3}}\] done
clear
D)
\[{{(C{{H}_{3}})}_{3}}C-\overset{O\,\,}{\mathop{\overset{||\,\,\,}{\mathop{C-}}\,}}\,C{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer12)
Which of the following products is formed when benzaldehyde is treated with \[C{{H}_{3}}MgBr\] and the addition product so obtained is subjected to acid hydrolysis [Haryana CEET 2000]
A)
Secondary alcohol done
clear
B)
A primary alcohol done
clear
C)
Phenol done
clear
D)
Tert-Butyl alcohol done
clear
View Solution play_arrow
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question_answer13)
Aldol condensation will not be observed in [GATE 2001]
A)
Chloral done
clear
B)
Phenyl acetaldehyde done
clear
C)
Hexanal done
clear
D)
Ethanol done
clear
View Solution play_arrow
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question_answer14)
Which of the following compounds containing carbonyl group will give coloured crystalline compound with
[Kerala (Med.) 2001]
A)
\[C{{H}_{3}}COCl\] done
clear
B)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}CO(O{{C}_{2}}{{H}_{5}})\,\] done
clear
D)
\[C{{H}_{3}}CON{{H}_{2}}\] done
clear
E)
\[HO({{C}_{6}}{{H}_{4}})COOH\] done
clear
View Solution play_arrow
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question_answer15)
Which of the following organic compounds exhibits positive Fehling test as well as iodoform test [MP PET 1994; KCET 2001]
A)
Methanal done
clear
B)
Ethanol done
clear
C)
Propanone done
clear
D)
Ethanal done
clear
View Solution play_arrow
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question_answer16)
Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali [CBSE PMT 1994]
A)
\[{{C}_{6}}{{H}_{5}}CHO\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
C)
\[CH\equiv C-CHO\] done
clear
D)
\[C{{H}_{2}}=CH-CHO\] done
clear
View Solution play_arrow
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question_answer17)
Acetaldehyde when treated with dilute NaOH gives [EAMCET 1998]
A)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
B)
\[C{{H}_{3}}COOH\] done
clear
C)
\[C{{H}_{3}}-\underset{\underset{OH}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-CHO\] done
clear
D)
\[C{{H}_{3}}-C{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer18)
\[{{C}_{2}}{{H}_{5}}CHO\] and \[{{(C{{H}_{3}})}_{2}}CO\] can be distinguished by testing with [EAMCET 1998; CPMT 1994, 97; MP PET 1995; MP PMT 1996; RPMT 1997, 99]
A)
Phenyl hydrazine done
clear
B)
Hydroxylamine done
clear
C)
Fehling solution done
clear
D)
Sodium bisulphite done
clear
View Solution play_arrow
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question_answer19)
Which of the following will undergo aldol condensation [IIT 1998]
A)
Acetaldehyde done
clear
B)
Propanaldehyde done
clear
C)
Benzaldehyde done
clear
D)
Trideuteroacetaldehyde done
clear
View Solution play_arrow
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question_answer20)
Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at \[5-{{10}^{o}}C\] [Roorkee Qualifying 1998]
A)
\[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}C\equiv C-\underset{\underset{OH}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{3}}\to \]
\[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}C\equiv \overset{\begin{smallmatrix}
O \\
|\,\,|
\end{smallmatrix}}{\mathop{C}}\,-C-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}CH=CH-C{{H}_{2}}OH\to \]\[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}CH=CH-CHO\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\to {{C}_{6}}{{H}_{5}}COOH\] done
clear
D)
\[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}C{{H}_{2}}OH\to C{{H}_{3}}{{(C{{H}_{2}})}_{3}}CHO\] done
clear
View Solution play_arrow
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question_answer21)
Acetaldehyde cannot show [AIIMS 1997]
A)
Iodoform test done
clear
B)
Lucas test done
clear
C)
Benedict's test done
clear
D)
Tollen's test done
clear
View Solution play_arrow
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question_answer22)
Benzaldehyde \[+NaOH\to \] [CPMT 1997, 2001; CBSE PMT 1999; Pb. PMT 1999]
A)
Benzyl alcohol done
clear
B)
Benzoic alcohol done
clear
C)
Hydrobenzamide done
clear
D)
Cinnamic acid done
clear
View Solution play_arrow
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question_answer23)
The following reagent converts \[{{C}_{6}}{{H}_{5}}COCHO\] to \[{{C}_{6}}{{H}_{5}}CHOHCOONa\] [Roorkee Qualifying 1998]
A)
Aq. NaOH done
clear
B)
Acidic \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}Cr{{O}_{4}}/{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[NaN{{O}_{2}}/HCl\] done
clear
View Solution play_arrow
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question_answer24)
Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as [KCET 2005]
A)
Perkin's reaction done
clear
B)
Cannizzaro's reaction done
clear
C)
Sandmeyer's reaction done
clear
D)
Claisen condensation done
clear
View Solution play_arrow
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question_answer25)
To distinguish between formaldehyde and acetaldehyde, we require [Orissa PMT 1987]
A)
Tollen's reagent done
clear
B)
Fehling's solution done
clear
C)
Schiff's reagent done
clear
D)
Caustic soda solution done
clear
View Solution play_arrow
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question_answer26)
Which of the following does not give iodoform test [AIIMS 1992; MP PMT 1990, 96; CET Pune 1998 DPMT 1981; CPMT 1976]
A)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
B)
\[C{{H}_{3}}OH\] done
clear
C)
\[C{{H}_{3}}CHO\] done
clear
D)
\[PhCOC{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer27)
Which of the following will not give iodoform test [Kurukshetra CEE 1991; Bihar CEE 1995; CBSE PMT 1998; MP PMT 2004]
A)
Ethanal done
clear
B)
Ethanol done
clear
C)
2-propanone done
clear
D)
3-pentanone done
clear
View Solution play_arrow
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question_answer28)
Which of the following will not give the iodoform test [MNR 1994]
A)
Acetophenone done
clear
B)
Ethanal done
clear
C)
Benzophenone done
clear
D)
Ethanol done
clear
View Solution play_arrow
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question_answer29)
Haloform test is given by the following substance [EAMCET 1988]
A)
HCHO done
clear
B)
\[{{(C{{H}_{3}})}_{2}}CO\] done
clear
C)
\[C{{H}_{3}}OC{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}Cl\] done
clear
View Solution play_arrow
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question_answer30)
Dimethyl ketones are usually characterised through [MNR 1992]
A)
Tollen's reagent done
clear
B)
Iodoform test done
clear
C)
Schiff's test done
clear
D)
Benedict's reagent done
clear
View Solution play_arrow
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question_answer31)
The light yellow compound produced when acetone reacts with iodine and alkali, is [MP PMT 1992; EAMCET 1993]
A)
\[C{{H}_{3}}.CO.C{{H}_{2}}I\] done
clear
B)
\[C{{H}_{3}}I\] done
clear
C)
\[CH{{I}_{3}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer32)
If formaldehyde and KOH are heated, then we get [MP PET 1999; KCET 2000]
A)
Acetylene done
clear
B)
Methane done
clear
C)
Methyl alcohol done
clear
D)
Ethyl formate done
clear
View Solution play_arrow
-
question_answer33)
Which of the following reagent reacts differently with \[HCHO,\,C{{H}_{3}}CHO\] and \[C{{H}_{3}}COC{{H}_{3}}\] [MP PET 1999]
A)
HCN done
clear
B)
\[N{{H}_{2}}N{{H}_{2}}\] done
clear
C)
\[N{{H}_{2}}OH\] done
clear
D)
\[N{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer34)
Acetaldehyde reacts with \[{{C}_{2}}{{H}_{5}}MgCl\] the final product is [Pb. CET 1985]
A)
An aldehyde done
clear
B)
A ketone done
clear
C)
A primary alcohol done
clear
D)
A secondary alcohol done
clear
View Solution play_arrow
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question_answer35)
Treatment of propionaldehyde with dilute NaOH solution gives [MNR 1992]
A)
\[C{{H}_{3}}C{{H}_{2}}COOC{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}CHOHCH(C{{H}_{3}})CHO\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CHOHC{{H}_{2}}C{{H}_{2}}CHO\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}COC{{H}_{2}}C{{H}_{2}}CHO\] done
clear
View Solution play_arrow
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question_answer36)
Aldol condensation of acetaldehyde involves the formation of which of the following intermediate [Pb. CET 1986]
A)
Acetate ion done
clear
B)
A carbanion done
clear
C)
A carbonium ion done
clear
D)
A free radical done
clear
View Solution play_arrow
-
question_answer37)
\[3C{{H}_{3}}COC{{H}_{3}}\xrightarrow{HCl}{{(C{{H}_{3}})}_{2}}C=CH-CO-CH=C{{(C{{H}_{3}})}_{2}}\] This polymer is obtained when acetone is saturated with hydrogen chloride gas, B can be [CBSE PMT 1989]
A)
Phorone done
clear
B)
Formose done
clear
C)
Diacetone alcohol done
clear
D)
Mesityl oxide done
clear
View Solution play_arrow
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question_answer38)
Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as [MNR 1987]
A)
Wurtz's reaction done
clear
B)
Cannizzaro reaction done
clear
C)
Friedel-Craft's reaction done
clear
D)
Claisen reaction done
clear
View Solution play_arrow
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question_answer39)
m-chlorobenzaldehyde on reaction with conc. KOH at room temperature gives [IIT-JEE 1991]
A)
Potassium m-chlorobenzoate and m-hydroxy benzaldehyde done
clear
B)
m-hydroxy benzaldehyde and m-chlorobenzyl alcohol done
clear
C)
m-chlorobenzyl alcohol and m-hydroxy benzyl alcohol done
clear
D)
Potassium m-chlorobenzoate and m-chlorobenzyl alcohol done
clear
View Solution play_arrow
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question_answer40)
Which of the following does not give yellow precipitate with \[NaOH+KI\] [MP PMT 1997]
A)
Acetone done
clear
B)
Acetaldehyde done
clear
C)
Benzaldehyde done
clear
D)
Acetophenone done
clear
View Solution play_arrow
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question_answer41)
The alkaline \[CuS{{O}_{4}}\] containing sodium potassium tartrate does not react with [MP PMT 1997]
A)
\[C{{H}_{3}}CHO\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}CHO\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CHO\] done
clear
D)
\[{{C}_{6}}{{H}_{5}}CHO\] done
clear
View Solution play_arrow
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question_answer42)
Correct order of reactivity of \[C{{H}_{3}}CHO,\,{{C}_{2}}{{H}_{5}}COC{{H}_{3}}\] and \[C{{H}_{3}}COC{{H}_{3}}\] is [MP PMT 1991]
A)
\[C{{H}_{3}}CHO>C{{H}_{3}}COC{{H}_{3}}>C{{H}_{3}}CO{{C}_{2}}{{H}_{5}}\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}COC{{H}_{3}}>C{{H}_{3}}COC{{H}_{3}}>C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}>C{{H}_{3}}CHO>{{C}_{2}}{{H}_{5}}COC{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}COC{{H}_{3}}>{{C}_{2}}{{H}_{5}}COC{{H}_{3}}>C{{H}_{3}}CHO\] done
clear
View Solution play_arrow
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question_answer43)
One mole of an organic compound requires 0.5 mole of oxygen to produce an acid. The compound may be [NCERT 1981]
A)
Alcohol done
clear
B)
Ether done
clear
C)
Ketone done
clear
D)
Aldehyde done
clear
View Solution play_arrow
-
question_answer44)
Aldehydes can be oxidised by [NCERT 1983]
A)
Tollen's reagent done
clear
B)
Fehling solution done
clear
C)
Benedict solution done
clear
D)
All of these done
clear
View Solution play_arrow
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question_answer45)
Silver mirror is a test for [DPMT 1983; CBSE PMT 1988]
A)
Aldehydes done
clear
B)
Thio alcohols done
clear
C)
Amines done
clear
D)
Ethers done
clear
View Solution play_arrow
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question_answer46)
\[C{{H}_{3}}CH=CHCHO\] is oxidised to \[C{{H}_{3}}CH=CHCOOH\] using [NCERT 1978]
A)
Alkaline \[KMn{{O}_{4}}\] done
clear
B)
Selenium dioxide done
clear
C)
Ammoniacal \[AgN{{O}_{3}}\] done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer47)
Which of the following does not turn Schiff's reagent to pink [DPMT 1981; CPMT 1989]
A)
Formaldehyde done
clear
B)
Benzaldehyde done
clear
C)
Acetone done
clear
D)
Acetaldehyde done
clear
View Solution play_arrow
-
question_answer48)
Fehling's test is positive for [KCET 1993]
A)
Acetaldehyde done
clear
B)
Benzaldehyde done
clear
C)
Ether done
clear
D)
Alcohol done
clear
View Solution play_arrow
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question_answer49)
Acetaldehyde and acetone differ in their reaction with [KCET 1989]
A)
Sodium bisulphite done
clear
B)
Ammonia done
clear
C)
Phosphorus pentachloride done
clear
D)
Phenyl hydrazine done
clear
View Solution play_arrow
-
question_answer50)
The final product formed when acetaldehyde is reduced with sodium and alcohol is [BHU 1976]
A)
Ethylene done
clear
B)
Ethyl alcohol done
clear
C)
Ethene done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer51)
The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentrated HCl is [MP PMT 1983]
A)
Propanol done
clear
B)
Propane done
clear
C)
Propene done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer52)
Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is known as [MP PET 1997]
A)
Perkin reaction done
clear
B)
Claisen reaction done
clear
C)
Cannizzaro reaction done
clear
D)
Knoevenagel reaction done
clear
View Solution play_arrow
-
question_answer53)
Aldehydes and ketones give addition reaction with [KCET 1992]
A)
Hydrazine done
clear
B)
Phenyl hydrazine done
clear
C)
Semicarbazide done
clear
D)
Hydrogen cyanide done
clear
E)
All of these done
clear
View Solution play_arrow
-
question_answer54)
Acetaldehyde reacts with [CBSE PMT 1991]
A)
Electrophiles only done
clear
B)
Nucleophiles only done
clear
C)
Free radicals only done
clear
D)
Both electrophiles and nucleophiles done
clear
View Solution play_arrow
-
question_answer55)
The typical reactions of aldehyde is [Pb. CET 1986]
A)
Electrophilic addition done
clear
B)
Nucleophilic substitution done
clear
C)
Nucleophilic addition done
clear
D)
Nucleophilic elimination done
clear
View Solution play_arrow
-
question_answer56)
Which will not give acetamide on reaction with ammonia [CPMT 1985]
A)
Acetic acid done
clear
B)
Acetyl chloride done
clear
C)
Acetic anhydride done
clear
D)
Methyl formate done
clear
View Solution play_arrow
-
question_answer57)
The addition of \[HCN\] to carbonyl compounds is an example of [Haryana CEET 2000]
A)
Nucleophilic substitution done
clear
B)
Electrophilic addition done
clear
C)
Nucleophilic addition done
clear
D)
Electrophilic substitution done
clear
View Solution play_arrow
-
question_answer58)
Which of the following reagents is used to distinguish acetone and acetophenone [RPMT 2002; KCET 1998]
A)
\[NaHS{{O}_{3}}\] done
clear
B)
Grignard reagent done
clear
C)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
D)
\[N{{H}_{4}}Cl\] done
clear
View Solution play_arrow
-
question_answer59)
The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalyst is [Tamil Nadu CET 2002]
A)
Chlorobenzene done
clear
B)
Benzyl chloride done
clear
C)
Benzoyl Chloride done
clear
D)
o-Chlorobenzaldehyde done
clear
View Solution play_arrow
-
question_answer60)
Which of the following compound is resistant to nucleophilic attack by hydroxyl ions [CBSE PMT 1998; KCET (Med.) 2001; AFMC 2001]
A)
Methyl acetate done
clear
B)
Acetonitrile done
clear
C)
Dimethyl ether done
clear
D)
Acetamide done
clear
View Solution play_arrow
-
question_answer61)
Glucose molecule reacts with X number of molecules of phenylhydrazine to yield osazone. The value of X is [CBSE PMT 1998]
A)
One done
clear
B)
Two done
clear
C)
Three done
clear
D)
Four done
clear
View Solution play_arrow
-
question_answer62)
In which of the following reactions aromatic aldehyde is treated with acid anhydride in presence of corresponding salt of the acid to give unsaturated aromatic acid [BHU 1998, KCET (Med.) 2001]
A)
Friedel-Craft's reaction done
clear
B)
Perkin reaction done
clear
C)
Wurtz reaction done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer63)
\[2C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\underset{{{H}^{+}}}{\mathop{\xrightarrow{Mg/Hg}}}\,\] Product, product in the reaction is [RPMT 2003]
A)
\[{{H}_{3}}C\ \ -\overset{\overset{C{{H}_{3}}}{\mathop{|\ \ \ \ \,\,}}\,}{\mathop{\underset{\underset{OH}{\mathop{\ |\ \,\ \ \ }}\,\ }{\mathop{C\ -}}\,}}\,\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\ \ \ \ \ }}\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{\underset{OH\,\,}{\mathop{|\,\,\,\ \ \ \ }}\,}{\mathop{C-C}}\,{{H}_{3}}}}\,\] done
clear
B)
\[C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-O-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}-\underset{\underset{OH}{\mathop{|\ \ \ }}\,}{\mathop{CH}}\,-\underset{\underset{OH}{\mathop{|\ \ \ }}\,}{\mathop{CH}}\,-C{{H}_{3}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer64)
Cinnamic acid is formed when \[{{C}_{6}}{{H}_{5}}-CHO\] condenses with \[{{(C{{H}_{3}}CO)}_{2}}O\] in presence of [Orissa JEE 2003]
A)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
Sodium acetate done
clear
C)
Sodium metal done
clear
D)
Anhydrous \[ZnC{{l}_{2}}\] done
clear
View Solution play_arrow
-
question_answer65)
A mixture of benzaldehyde and formaldehyde on heating with aqueous \[NaOH\] solution gives [IIT-JEE (Screening) 2001]
A)
Benzyl alcohol and sodium formate done
clear
B)
Sodium benzoate and methyl alcohol done
clear
C)
Sodium benzoate and sodium formate done
clear
D)
Benzyl alcohol and methyl alcohol done
clear
View Solution play_arrow
-
question_answer66)
The reaction, \[C{{H}_{3}}-\overset{\overset{O}{\mathop{||}}\,}{\mathop{C}}\,-OC{{H}_{3}}+{{C}_{2}}{{H}_{5}}OH\xrightarrow{{{H}^{+}}\ or\ O{{H}^{-}}}\] \[C{{H}_{3}}-\overset{\overset{O}{\mathop{||}}\,}{\mathop{C}}\,-O{{C}_{2}}{{H}_{5}}+\ C{{H}_{3}}OH\] is called [MP PMT 2003]
A)
Perkin's reaction done
clear
B)
Claisen Schmidt reaction done
clear
C)
Esterification done
clear
D)
Trans-esterification done
clear
View Solution play_arrow
-
question_answer67)
Formaldehyde reacts with ammonia to give urotropine. The formula of urotropine is [MP PMT 1989, 96, 2003; AIIMS 1982; NCERT 1987; MP PET 1990, 91, 2000; CPMT 1978, 82, 86, 97; KCET 2003]
A)
\[{{(C{{H}_{2}})}_{6}}{{N}_{4}}\] done
clear
B)
\[{{(C{{H}_{2}})}_{4}}{{N}_{3}}\] done
clear
C)
\[{{(C{{H}_{2}})}_{6}}{{N}_{6}}\] done
clear
D)
\[{{(C{{H}_{2}})}_{3}}{{N}_{3}}\] done
clear
View Solution play_arrow
-
question_answer68)
Aldol condensation will not take place in [CBSE PMT 1996, 99; RPMT 1999; CPMT 1988, 04]
A)
HCHO done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
C)
\[C{{H}_{3}}CHO\] done
clear
D)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer69)
Contents of three bottles were found to react (i) Neither with Fehling's solution nor with Tollen's reagent (ii) Only with Tollen's reagent but not with Fehling's solution (iii) With both Tollen's reagent and Fehling's solution. If they contained either ethanal (acetaldehyde) or propanone (acetone) or benzal (benzaldehyde), which bottle contained which
A)
In (i) benzal, in (ii) ethanal and in (iii) propanone done
clear
B)
In (i) benzal, in (ii) propanone and in (iii) ethanal done
clear
C)
In (i) propanone, in (ii) benzal and in (iii) ethanol done
clear
D)
In (i) propanone, in (ii) ethanal and in (iii) benzal done
clear
View Solution play_arrow
-
question_answer70)
Action of hydrazine on aldehydes and ketones gives compound of the general structure
A)
\[>C=N-N{{H}_{2}}\] done
clear
B)
\[>C=N-OH\] done
clear
C)
\[>C=N-NH-CON{{H}_{2}}\] done
clear
D)
\[>C=N-NH-{{C}_{6}}{{H}_{5}}\] done
clear
View Solution play_arrow
-
question_answer71)
The reaction in which sodium cyanide is used [MP PET/PMT 1998]
A)
Perkin reaction done
clear
B)
Reimer-Tiemann reaction done
clear
C)
Benzoin condensation done
clear
D)
Rosenmund reaction done
clear
View Solution play_arrow
-
question_answer72)
Which one of the following reactions is a method for the conversion of a ketone into a hydrocarbon [MP PET/PMT 1998; CBSE PMT 1989]
A)
Aldol condensation done
clear
B)
Reimer-Tiemann reaction done
clear
C)
Cannizzaro reaction done
clear
D)
Wolf-Kishner reduction done
clear
View Solution play_arrow
-
question_answer73)
Bakelite is a polymer of [DPMT 1996; MP PET 2002]
A)
\[HCHO+\]phenol done
clear
B)
\[HCHO+\]aldehyde (acetaldehyde) done
clear
C)
Phenol\[+{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[HCHO+\]acetone done
clear
View Solution play_arrow
-
question_answer74)
Clemmenson reduction involves \[>C=O\] to \[>C{{H}_{2}}\] in presence of [DPMT 1996]
A)
Zn / Hg done
clear
B)
Alcohol done
clear
C)
Zn dust done
clear
D)
Zn / alcohol done
clear
View Solution play_arrow
-
question_answer75)
Aldol condensation involving \[C{{H}_{3}}CHO+C{{H}_{3}}CHO\] gives the product [DPMT 1996]
A)
\[C{{H}_{3}}CHOHC{{H}_{2}}CHO\] done
clear
B)
\[C{{H}_{3}}COC{{H}_{2}}C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}CH=C{{H}_{2}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer76)
Enol content is highest in [Orissa JEE 2005]
A)
Acetone done
clear
B)
Acetophenone done
clear
C)
Acetic acid done
clear
D)
Acetyl acetone done
clear
View Solution play_arrow
-
question_answer77)
Which one of the following reacts with HCN and Tollen's reagent, but is not oxidised by Fehling's solution
A)
Methanal done
clear
B)
Ethanal done
clear
C)
Benzaldehyde done
clear
D)
Acetone done
clear
View Solution play_arrow
-
question_answer78)
During reaction of benzaldehyde with alkali one of the product is
A)
Phenol done
clear
B)
Benzyl alcohol done
clear
C)
Benzene done
clear
D)
Benzophenone done
clear
View Solution play_arrow
-
question_answer79)
Cannizzaro reaction is given by [DPMT 1996]
A)
HCHO done
clear
B)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}CHO\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
View Solution play_arrow
-
question_answer80)
The reaction \[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}CHO\to {{C}_{6}}{{H}_{5}}CH=CH-CHO\] is known as [BHU 1996]
A)
Perkin's reaction done
clear
B)
Claisen condensation done
clear
C)
Benzoin condensation done
clear
D)
Cannizzaro's reaction done
clear
View Solution play_arrow
-
question_answer81)
When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms [Bihar MEE 1996]
A)
Acetal done
clear
B)
Sodium formate done
clear
C)
Aldol done
clear
D)
Mesitylene done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer82)
Acetaldehyde on treatment with dil. NaOH followed by heating gives [CET Pune 1998]
A)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\] done
clear
C)
\[C{{H}_{3}}-CH=CHCHO\] done
clear
D)
\[C{{H}_{3}}-CH=CHC{{H}_{2}}OH\] done
clear
View Solution play_arrow
-
question_answer83)
Reaction \[\begin{matrix} R \\ R \\ \end{matrix}>CO+HCN\to R-\underset{\underset{CN}{\mathop{|}}\,}{\mathop{\overset{\overset{R}{\mathop{|}}\,}{\mathop{C}}\,}}\,-OH\] is [Kurukshetra CEE 1998; IIT 1990]
A)
Electrophilic substitution done
clear
B)
Electrophilic addition done
clear
C)
Nucleophilic addition done
clear
D)
Nucleophilic substitution done
clear
View Solution play_arrow
-
question_answer84)
Benzaldehyde on reaction with acetophenone in the presence of sodium hydroxide solution gives [BVP 2003]
A)
\[{{C}_{6}}{{H}_{5}}CH=CHCO{{C}_{6}}{{H}_{5}}\] done
clear
B)
\[{{C}_{6}}{{H}_{5}}COC{{H}_{2}}{{C}_{6}}{{H}_{5}}\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}CH=CH{{C}_{6}}{{H}_{5}}\] done
clear
D)
\[{{C}_{6}}{{H}_{5}}CH(OH)CO{{C}_{6}}{{H}_{5}}\] done
clear
View Solution play_arrow
-
question_answer85)
Aldehydes and ketones can be reduced to hydrocarbon by using [Orissa JEE 2003]
A)
\[LiAl{{H}_{4}}\] done
clear
B)
\[{{H}_{2}}/Pd-BaS{{O}_{4}}\] done
clear
C)
\[Na-Hg/HCl\] done
clear
D)
\[N{{H}_{2}}-N{{H}_{2}}/{{C}_{2}}{{H}_{5}}ONa\] done
clear
View Solution play_arrow
-
question_answer86)
An important reaction of acetone is autocondensation in presence of concentrated sulphuric acid to give the aromatic compound [KCET 2003; MP PET 1986, 89; MP PMT 1992, 2000]
A)
Mesitylene done
clear
B)
Mesityl oxide done
clear
C)
Trioxan done
clear
D)
Phorone done
clear
View Solution play_arrow
-
question_answer87)
Identify the organic compound which, on heating with strong solution of \[NaOH\], partly converted into an acid salt and partly into alcohol [KCET 2003]
A)
Benzyl alcohol done
clear
B)
Acetaldehyde done
clear
C)
Acetone done
clear
D)
Benzaldehyde done
clear
View Solution play_arrow
-
question_answer88)
Which of the following does not give brick red precipitate with Fehling solution [AIIMS 1996]
A)
Acetone done
clear
B)
Acetaldehyde done
clear
C)
Formalin done
clear
D)
D-glucose done
clear
View Solution play_arrow
-
question_answer89)
Acetaldehyde and acetone can be distinguished by [AIIMS 1996; DCE 1999; Pb. CET 2000]
A)
Molisch test done
clear
B)
Bromoform test done
clear
C)
Solubility in water done
clear
D)
Tollen's test done
clear
View Solution play_arrow
-
question_answer90)
Which compound is soluble in \[{{H}_{2}}O\] [RPMT 1997]
A)
HCHO done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
D)
All done
clear
View Solution play_arrow
-
question_answer91)
\[C{{H}_{3}}CHO+C{{H}_{3}}MgBr\to \text{Product}\xrightarrow{{{H}_{2}}O}A\] What is A? [RPMT 1997]
A)
Primary alcohol done
clear
B)
Secondary alcohol done
clear
C)
Tertiary alcohol done
clear
D)
Ketone done
clear
View Solution play_arrow
-
question_answer92)
Which gives lactic acid on hydrolysis after reacting with HCN [UPSEAT 2003; MP PMT 2003]
A)
\[HCHO\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}CHO\] done
clear
D)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer93)
\[C{{H}_{3}}CHO\] react with aqueous NaOH solution to form [MP PMT 1992]
A)
3-hydroxy butanal done
clear
B)
2-hydroxy butanal done
clear
C)
4-hydroxy butanal done
clear
D)
3-hydroxy butanol done
clear
View Solution play_arrow
-
question_answer94)
Fehling solution react with HCHO to form precipitate of [MP PMT 1992]
A)
White colour done
clear
B)
Yellow colour done
clear
C)
Red colour done
clear
D)
Blue colour done
clear
View Solution play_arrow
-
question_answer95)
Product in following reaction is \[C{{H}_{3}}MgI+HCHO\to \]Product [RPMT 2003; BHU 1998, 2005; DCE 1999]
A)
\[C{{H}_{3}}CHO\] done
clear
B)
\[C{{H}_{3}}OH\] done
clear
C)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
D)
\[C{{H}_{3}}-O-C{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer96)
\[A\underset{{{800}^{o}}C}{\mathop{\xrightarrow{\Delta }}}\,C{{H}_{2}}=C=O\], Reactant ?A? in the reaction is [RPMT 2003]
A)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\] done
clear
D)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
View Solution play_arrow
-
question_answer97)
Only an aldehyde having..... can undergo the aldol condensation [KCET 1998]
A)
At least one beta H atom done
clear
B)
At least one alpha H atom done
clear
C)
An aromatic ring done
clear
D)
No alpha H atom done
clear
View Solution play_arrow
-
question_answer98)
Clemenson's reduction of ketones is carried out in [BHU 2000]
A)
\[{{H}_{2}}\] with Pd catalyst done
clear
B)
Glycol with \[KOH\] done
clear
C)
\[LiAl{{H}_{4}}\] in water done
clear
D)
\[Zn-Hg\] with \[HCl\] done
clear
View Solution play_arrow
-
question_answer99)
Reaction \[\begin{matrix} R \\ R \\ \end{matrix}>C=O\underset{KOH/\text{glycol}}{\mathop{\xrightarrow{{{H}_{2}}NN{{H}_{2}}}}}\,\begin{matrix} R \\ R \\ \end{matrix}>C<\begin{matrix} H \\ H \\ \end{matrix}+{{N}_{2}}+{{H}_{2}}\] is called [MP PET 2003]
A)
Wolff?Kishner reaction done
clear
B)
Tischenko reaction done
clear
C)
Reformatsky reaction done
clear
D)
Gattermann reaction done
clear
View Solution play_arrow
-
question_answer100)
Propanal on treatment with dilute sodium hydroxide forms [Kerala CET 2000]
A)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}CHO\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}CH(OH)C{{H}_{2}}C{{H}_{2}}CHO\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CH(OH)CH(C{{H}_{3}})CHO\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}COONa\] done
clear
View Solution play_arrow
-
question_answer101)
Identify the product \[Y\] in the sequence \[C{{H}_{3}}CHO+C{{H}_{3}}Mgl\xrightarrow{\text{Ether}}X\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Y\] [Kerala (Med.) 2001]
A)
\[C{{H}_{3}}OH\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
C)
\[{{(C{{H}_{3}})}_{2}}CHOH\] done
clear
D)
\[{{(C{{H}_{3}})}_{3}}COH\] done
clear
View Solution play_arrow
-
question_answer102)
What is the name of reaction when benzaldehyde changes into benzyl alcohol [CPMT 1996; RPET 1999]
A)
Friedel-Craft's reaction done
clear
B)
Kolbe's reaction done
clear
C)
Wurtz reaction done
clear
D)
Cannizzaro reaction done
clear
View Solution play_arrow
-
question_answer103)
The reagent that gives an orange coloured precipitate with acetaldehyde [EAMCET 1997; Pb. PMT 2004; AIIMS 1987]
A)
\[N{{H}_{2}}OH\] done
clear
B)
\[NaHS{{O}_{3}}\] done
clear
C)
Iodine done
clear
D)
2, 4-DNP done
clear
View Solution play_arrow
-
question_answer104)
Which one is used in the manufacture of mirror [MP PET 1992]
A)
Red lead (litharge) done
clear
B)
Ammoniacal \[AgN{{O}_{3}}\] done
clear
C)
Ammoniacal \[AgN{{O}_{3}}+\] Red lead done
clear
D)
Ammoniacal \[AgN{{O}_{3}}+HCHO\] done
clear
View Solution play_arrow
-
question_answer105)
When \[C{{H}_{3}}COC{{H}_{3}}\] reacts with \[C{{l}_{2}}\] and NaOH, which of the following is formed [CPMT 1996]
A)
\[CHC{{l}_{3}}\] done
clear
B)
\[CC{{l}_{4}}\] done
clear
C)
\[CC{{l}_{2}}{{H}_{2}}\] done
clear
D)
\[C{{H}_{3}}Cl\] done
clear
View Solution play_arrow
-
question_answer106)
Which gives difference between aldehyde and ketone [CPMT 1994]
A)
Fehling's solution done
clear
B)
Tollen's reagent done
clear
C)
Schiff's reagent done
clear
D)
Benedict's solution done
clear
E)
All of these done
clear
View Solution play_arrow
-
question_answer107)
Aldehyde turns pink with [Bihar MEE 1997]
A)
Benedict solution done
clear
B)
Schiff reagent done
clear
C)
Fehling solution done
clear
D)
Tollen's reagent done
clear
E)
Mollisch reagent done
clear
View Solution play_arrow
-
question_answer108)
Which of the following would undergo aldol condensation [MP PMT 1986; BHU 1995]
A)
\[CC{{l}_{3}}.CHO\] done
clear
B)
\[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{C\,\,-}}\,}}\,CHO\] done
clear
C)
\[C{{H}_{3}}.C{{H}_{2}}.CHO\] done
clear
D)
HCHO done
clear
View Solution play_arrow
-
question_answer109)
The reaction of acetaldehyde with conc. \[KMn{{O}_{4}}\] gives [DPMT 1982; AIIMS 1996]
A)
\[C{{H}_{3}}COOH\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
C)
HCHO done
clear
D)
\[C{{H}_{3}}OH\] done
clear
View Solution play_arrow
-
question_answer110)
When acetaldehyde is heated with Tollen's reagent, following is obtained [CPMT 1989; MP PET/PMT 1988]
A)
Methyl alcohol done
clear
B)
Silver acetate done
clear
C)
Silver mirror done
clear
D)
Formaldehyde done
clear
View Solution play_arrow
-
question_answer111)
Boiling point of acetone is [CPMT 1975, 89]
A)
\[{{56}^{o}}C\] done
clear
B)
\[{{60}^{o}}C\] done
clear
C)
\[{{100}^{o}}C\] done
clear
D)
\[{{90}^{o}}C\] done
clear
View Solution play_arrow
-
question_answer112)
Urotropine is
A)
Hexamethylene tetramine done
clear
B)
Hexaethylene tetramine done
clear
C)
Hexamethylene diamine done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer113)
Magenta is [DPMT 1982; Kurukshetra CEE 1998]
A)
Alkaline phenolphthalein done
clear
B)
Methyl red done
clear
C)
p-rosaniline hydrochloride done
clear
D)
Red litmus done
clear
View Solution play_arrow
-
question_answer114)
An aldehyde on oxidation gives [CPMT 1973, 03; DPMT 1983; Manipal MEE 1995]
A)
An alcohol done
clear
B)
An acid done
clear
C)
A ketone done
clear
D)
An ether done
clear
View Solution play_arrow
-
question_answer115)
The reaction of an aldehyde with hydroxylamine gives a product which is called [MP PET 1993; AFMC 2002]
A)
Aminohydroxide done
clear
B)
Hydrazone done
clear
C)
Semicarbazone done
clear
D)
Oxime done
clear
View Solution play_arrow
-
question_answer116)
Cannizzaro reaction is not shown by [BHU 1980; IIT 1983; KCET 1993; Bihar MEE 1995; RPMT 1997, 2000, 02]
A)
HCHO done
clear
B)
\[{{C}_{6}}{{H}_{5}}CHO\] done
clear
C)
\[C{{H}_{3}}CHO\] done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer117)
When acetone is heated with hydroxylamine, the compound formed is [MP PMT 1993]
A)
Cyanohydrin done
clear
B)
Oxime done
clear
C)
Semicarbazone done
clear
D)
Hydrazone done
clear
View Solution play_arrow
-
question_answer118)
The product of the reaction between ammonia and formaldehyde is [MP PMT 1993]
A)
Urotropine done
clear
B)
Formamide done
clear
C)
Paraformaldehyde done
clear
D)
Methanol done
clear
View Solution play_arrow
-
question_answer119)
Which of the following products is obtained by the oxidation of propionaldehyde [CPMT 1989]
A)
Acetic acid done
clear
B)
Formic acid and acetic acid done
clear
C)
Propanoic acid done
clear
D)
n-propyl alcohol done
clear
View Solution play_arrow
-
question_answer120)
When acetaldehyde reacts with \[PC{{l}_{5}},\] the resulting compound is [MP PMT 1992, 93]
A)
Ethyl chloride done
clear
B)
Ethylene chloride done
clear
C)
Ethylidene chloride done
clear
D)
Trichloro acetaldehyde done
clear
View Solution play_arrow
-
question_answer121)
Benzaldehyde and acetaldehyde can be differentiated by
A)
HCN done
clear
B)
\[N{{H}_{2}}OH\] done
clear
C)
Hydrazine done
clear
D)
NaOH solution done
clear
View Solution play_arrow
-
question_answer122)
In the presence of a dilute base \[{{C}_{6}}{{H}_{5}}CHO\] and \[C{{H}_{3}}CHO\] react together to give a product. The product is [MP PET 1994]
A)
\[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\] done
clear
B)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{H}_{2}}OH\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\] done
clear
D)
\[{{C}_{6}}{{H}_{5}}CH=CHCHO\] done
clear
View Solution play_arrow
-
question_answer123)
Grignard's reagent reacts with ethanal (acetaldehyde) and propanone to give
A)
Higher aldehydes with ethanal and higher ketones with propanone done
clear
B)
Primary alcohols with ethanal and secondary alcohols with propanone done
clear
C)
Ethers with ethanal and alcohols with propanone done
clear
D)
Secondary alcohols with ethanal and tertiary alcohols with propanone done
clear
View Solution play_arrow
-
question_answer124)
Base catalysed aldol condensation occurs with [IIT-JEE 1991]
A)
Benzaldehyde done
clear
B)
2, 2-dimethyl propionaldehyde done
clear
C)
Acetaldehyde done
clear
D)
Formaldehyde done
clear
View Solution play_arrow
-
question_answer125)
Benzaldehyde reacts with ammonia to form [CPMT 1989; AFMC 1998]
A)
Benzaldehyde ammonia done
clear
B)
Urotropine done
clear
C)
Hydrobenzamide done
clear
D)
Aniline done
clear
View Solution play_arrow
-
question_answer126)
Glucose + Tollen's reagent \[\to \] Silver mirror shows [CPMT 1997]
A)
Presence of acidic group done
clear
B)
Presence of alkaline group done
clear
C)
Presence of ketonic group done
clear
D)
Presence of aldehyde group done
clear
View Solution play_arrow
-
question_answer127)
Fehling solution is [MP PMT 1989]
A)
Ammoniacal cuprous chloride solution done
clear
B)
Acidified copper sulphate solution done
clear
C)
Copper sulphate and sodium hydroxide + Rochelle salt done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer128)
Reduction of an aldehyde produces [MP PMT 1994; MP PET 2001]
A)
Primary alcohol done
clear
B)
Monocarboxylic acid done
clear
C)
Secondary alcohol done
clear
D)
Tertiary alcohol done
clear
View Solution play_arrow
-
question_answer129)
Which of the following on reaction with conc. NaOH gives an alcohol [MP PET 1996]
A)
Methanal done
clear
B)
Ethanal done
clear
C)
Propanal done
clear
D)
Butanal done
clear
View Solution play_arrow
-
question_answer130)
Schiff's reagent is [MP PMT 1989]
A)
Magenta colour solution decolourised with sulphurous acid done
clear
B)
Ammoniacal cobalt chloride solution done
clear
C)
Ammoniacal manganese sulphate solution done
clear
D)
Magenta solution decolourised with chlorine done
clear
View Solution play_arrow
-
question_answer131)
Pyrolysis of acetone gives \[C{{H}_{2}}=C=O\] called
A)
Methylene oxide done
clear
B)
Methyl carbon monoxide done
clear
C)
Ketene done
clear
D)
Methone done
clear
View Solution play_arrow
-
question_answer132)
Which one of the following on oxidation will not give a carboxylic acid with the same number of carbon atoms [CBSE PMT 1992; MP PET 1996]
A)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
B)
\[CC{{l}_{3}}C{{H}_{2}}CHO\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
View Solution play_arrow
-
question_answer133)
Acetal is obtained by reacting in the presence of dry HCl and alcohol with [MP PET 1996]
A)
Aldehyde done
clear
B)
Ketone done
clear
C)
Ether done
clear
D)
Carboxylic acid done
clear
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question_answer134)
The reagent with which both aldehyde and acetone react easily is [CPMT 1973, 74, 89; BIT 1992]
A)
Fehling's reagent done
clear
B)
Grignard reagent done
clear
C)
Schiff's reagent done
clear
D)
Tollen's reagent done
clear
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question_answer135)
Phenylmethanol can be prepared by reducing the benzaldehyde with [CBSE PMT 1997]
A)
\[C{{H}_{3}}Br\] done
clear
B)
Zn and HCl done
clear
C)
\[C{{H}_{3}}Br\] and Na done
clear
D)
\[C{{H}_{3}}I\] and \[Mg\] done
clear
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question_answer136)
Which of the following is used in the manufacture of thermosetting plastics
A)
Formaldehyde done
clear
B)
Acetaldehyde done
clear
C)
Acetone done
clear
D)
Benzaldehyde done
clear
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question_answer137)
Which compound undergoes iodoform reaction [DPMT 1984; CPMT 1989]
A)
HCHO done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}OH\] done
clear
D)
\[C{{H}_{3}}COOH\] done
clear
View Solution play_arrow
-
question_answer138)
Which does not react with Fehling solution [MNR 1983, 93]
A)
Acetaldehyde done
clear
B)
Benzaldehyde done
clear
C)
Glucose done
clear
D)
Formic acid done
clear
View Solution play_arrow
-
question_answer139)
Which of the following compound will react with ethanolic KCN [IIT-JEE 1984]
A)
Ethane done
clear
B)
Acetyl chloride done
clear
C)
Chlorobenzene done
clear
D)
Benzaldehyde done
clear
View Solution play_arrow
-
question_answer140)
Schiff's reagent gives pink colour with [EAMCET 1980; MP PMT 2000]
A)
Aldehydes done
clear
B)
Ethers done
clear
C)
Ketones done
clear
D)
Carboxylic acid done
clear
View Solution play_arrow
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question_answer141)
Acetaldehyde reacts with \[C{{l}_{2}}\] (in excess) to give [MP PMT 1997]
A)
Chloral done
clear
B)
Chloroform done
clear
C)
Acetic acid done
clear
D)
Trichloroacetic acid done
clear
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question_answer142)
The compound which reacts with Fehling solution is [CPMT 1989]
A)
\[{{C}_{6}}{{H}_{5}}COOH\] done
clear
B)
HCOOH done
clear
C)
\[{{C}_{6}}{{H}_{5}}CHO\] done
clear
D)
\[C{{H}_{2}}ClC{{H}_{3}}\] done
clear
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-
question_answer143)
Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid [AIEEE 2004]
A)
Butanal done
clear
B)
Benzaldehyde done
clear
C)
Phenol done
clear
D)
Benzoic acid done
clear
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-
question_answer144)
Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon [AIEEE 2004]
A)
Acetamide done
clear
B)
Acetic acid done
clear
C)
Ethyl acetate done
clear
D)
Butan?2?one done
clear
View Solution play_arrow
-
question_answer145)
Three molecules of acetone in the presence of dry HCl form [MP PET 2004]
A)
Mesitylene done
clear
B)
Phorone done
clear
C)
Glyoxal done
clear
D)
Mesityl oxide done
clear
View Solution play_arrow
-
question_answer146)
Aldehydes and ketones can be reduced to corresponding hydrocarbons by [Kerala PMT 2004]
A)
Refluxing with water done
clear
B)
Refluxing with strong acids done
clear
C)
Refluxing with soda amalgam and water done
clear
D)
Refluxing with zinc amalgam and concentrated HCl done
clear
E)
Passing the vapour under heated \[Pb{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer147)
Acetone reacts with iodine to form iodoform in the presence of [BHU 2004; CPMT 2004]
A)
\[CaC{{O}_{3}}\] done
clear
B)
\[NaOH\] done
clear
C)
\[KOH\] done
clear
D)
\[MgC{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer148)
Cyanohydrin of which of the following forms lactic acid [MHCET 2003]
A)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[HCHO\] done
clear
D)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer149)
Which of the following is used to detect aldehydes [MHCET 2004]
A)
Million's test done
clear
B)
Tollen's reagent done
clear
C)
Neutral ferric chloride solution done
clear
D)
Molisch's test done
clear
View Solution play_arrow
-
question_answer150)
Which of the following aldehydes give red precipitate with Fehling solution ? [MHCET 2004]
A)
Benzaldehyde done
clear
B)
Salicylaldehyde done
clear
C)
Acetaldehyde done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer151)
\[A\xrightarrow{{}}{{(C{{H}_{3}})}_{2}}C=CHCOC{{H}_{3}}A\] is [MHCET 2004]
A)
Acetone done
clear
B)
Acetaldehyde done
clear
C)
Propionaldehyde done
clear
D)
Formaldehyde done
clear
View Solution play_arrow
-
question_answer152)
The aldehyde which react with NaOH to produce an alcohol and sodium salt is [Pb. PMT 2004]
A)
HCHO done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\] done
clear
View Solution play_arrow
-
question_answer153)
Acetaldehyde and Acetone can be distinguished by [DCE 2003]
A)
Iododorm test done
clear
B)
Nitroprusside test done
clear
C)
Fehling's solution test done
clear
D)
DNP test done
clear
View Solution play_arrow
-
question_answer154)
\[OCH-CHO\xrightarrow{O{{H}^{-}}}HO{{H}_{2}}C-COOH\] The reaction given is [DCE 2003]
A)
Aldol condensation done
clear
B)
Knovengel reaction done
clear
C)
Cannizzaro reaction done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer155)
The order of susceptibility of nucleophilic attack on aldehydes follows the order [DCE 2002]
A)
\[1{}^\circ >3{}^\circ >2{}^\circ ~\] done
clear
B)
\[1{}^\circ >2{}^\circ >3{}^\circ ~\] done
clear
C)
\[3{}^\circ >2{}^\circ >1{}^\circ ~\] done
clear
D)
\[2{}^\circ >3{}^\circ >1{}^\circ ~\] done
clear
View Solution play_arrow
-
question_answer156)
In Wolf-Kishner reduction, the carbonyl group of aldehydes and ketones is converted into [Pb. CET 2000]
A)
\[>C{{H}_{2}}\] group done
clear
B)
\[-C{{H}_{3}}\] group done
clear
C)
\[-C{{H}_{2}}OH\]group done
clear
D)
\[>CHOH\] group done
clear
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-
question_answer157)
Which of the following react with \[NaHS{{O}_{3}}\] [Pb. CET 2003]
A)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[HCHO\] done
clear
D)
All of these done
clear
View Solution play_arrow
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question_answer158)
Fehling solution is [Pb. CET 2003]
A)
\[CuS{{O}_{4}}\]+ lime done
clear
B)
\[CuS{{O}_{4}}+NaOH(aq)\] done
clear
C)
\[CuS{{O}_{4}}+N{{a}_{2}}C{{O}_{3}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer159)
Wolf kishner reduction, reduces [Pb. CET 2003]
A)
\[-COOH\] group done
clear
B)
\[-C\equiv C-\] group done
clear
C)
\[-CHO\] group done
clear
D)
\[-O-\]group done
clear
View Solution play_arrow
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question_answer160)
A compound has a vapour density of 29. On warming an aqueous solution of alkali, it gives a yellow precipitate. The compound is [DPMT 2004]
A)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
B)
\[C{{H}_{3}}CHOHC{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}COOH\] done
clear
View Solution play_arrow
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question_answer161)
Which responds to +ve iodoform test? [Orissa JEE 2004]
A)
Butanol done
clear
B)
Butan-1-al done
clear
C)
Butanol-2 done
clear
D)
3-pentanone done
clear
View Solution play_arrow
-
question_answer162)
The correct order of reactivity of PhMgBr with [IIT-JEE (Screening) 2004] \[\overset{\overset{O}{\mathop{||}}\,}{\mathop{Ph-C-Ph}}\,\] \[\overset{\overset{\,\,\,\,\,\,O}{\mathop{\,\,\,\,\,\,\,\,\,||}}\,}{\mathop{C{{H}_{3}}-C-H}}\,\] \[\overset{\overset{\,O}{\mathop{||}}\,}{\mathop{C{{H}_{3}}-C-C{{H}_{3}}}}\,\] is (I) (II) (III)
A)
(I) > (II) > (III) done
clear
B)
(III) > (II) > (I) done
clear
C)
(II) > (III) > (I) done
clear
D)
(I) > (III) > (II) done
clear
View Solution play_arrow
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question_answer163)
The pair of compounds in which both the compounds give positive test with Tollen's reagent is [IIT-JEE (Screening) 2004]
A)
Glucose and Sucrose done
clear
B)
Fructose and Sucrose done
clear
C)
Acetophenone and Hexanal done
clear
D)
Glucose and Fructose done
clear
View Solution play_arrow
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question_answer164)
The most appropriate reagent to distinguish between acetaldehyde and formaldehyde is [UPSEAT 2004]
A)
Fehling's solution done
clear
B)
Tollen's reagent done
clear
C)
Schiff's reagent done
clear
D)
Iodine in presence of base done
clear
View Solution play_arrow
-
question_answer165)
Silver mirror test can be used to distinguish between [MP PET 2004]
A)
Ketone and acid done
clear
B)
Phenol and acid done
clear
C)
Aldehyde and acid done
clear
D)
Alcohol and phenol done
clear
View Solution play_arrow
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question_answer166)
Paraldehyde is [CPMT 1985; MP PET 1992, 96; RPMT 2000]
A)
A trimer of formaldehyde done
clear
B)
A trimer of acetaldehyde done
clear
C)
A hexamer of formaldehyde done
clear
D)
A hexamer of acetaldehyde done
clear
View Solution play_arrow
-
question_answer167)
Paraldehyde is used as a [CBSE PMT 1989]
A)
Medicine done
clear
B)
Poison done
clear
C)
Polymer done
clear
D)
Dye done
clear
View Solution play_arrow
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question_answer168)
Formalin is an aqueous solution of [BHU 1979; DPMT 1983]
A)
Formic acid done
clear
B)
Formaldehyde done
clear
C)
Fluorescein done
clear
D)
Furfur aldehyde done
clear
View Solution play_arrow
-
question_answer169)
Hexamethylene tetramine is used as [MP PMT 1979, 84]
A)
Analgesic done
clear
B)
Antipyretic done
clear
C)
Urinary antiseptic done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer170)
Methyl ketone group is identified by [BCECE 2005]
A)
Iodoform test done
clear
B)
Fehling solution done
clear
C)
Tollen?s reagent done
clear
D)
Shiff?s reagent done
clear
View Solution play_arrow
-
question_answer171)
Which of the following does not give Fehling solution test? [BCECE 2005]
A)
Acetone done
clear
B)
Propanal done
clear
C)
Ethanal done
clear
D)
Butanal done
clear
View Solution play_arrow
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question_answer172)
How will you convert butan-2-one to propanoic acid? [IIT 2005]
A)
Tollen-s reagent done
clear
B)
Fehling's solution done
clear
C)
\[NaOH/{{I}_{2}}/{{H}^{+}}\] done
clear
D)
\[NaOH/NaI/{{H}^{+}}\] done
clear
View Solution play_arrow
-
question_answer173)
Ketones react with Mg-Hg over water gives [AFMC 2005]
A)
Pinacolone done
clear
B)
Pinacols done
clear
C)
Alcohols done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer174)
Which of the following will form two isomers with semi carbazide [Orissa JEE 2005]
A)
Benzaldehyde done
clear
B)
Acetone done
clear
C)
Benzoquinone done
clear
D)
Benzophenone done
clear
View Solution play_arrow
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question_answer175)
A compound \[A\to {{C}_{5}}{{H}_{10}}C{{l}_{2}}\] on hydrolysis gives \[{{C}_{5}}{{H}_{10}}O\] which reacts with \[N{{H}_{2}}OH\], forms iodoform but does not give fehling test. \[A\] is [DPMT 2005]
A)
\[C{{H}_{3}}\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{-C-}}\,}}\,}}\,}}\,C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{-C-}}\,}}\,}}\,}}\,C{{H}_{2}}C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}\underset{Cl\,\,}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{\overset{Cl\,}{\mathop{\overset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,}}\,}}\,\] done
clear
D)
\[C{{H}_{3}}\overset{Cl}{\mathop{\overset{|}{\mathop{-CH}}\,}}\,\overset{Cl}{\mathop{\overset{|}{\mathop{-CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer176)
\[C{{H}_{3}}-CHO+HCN\to A\]; Compound \[A\] on hydrolysis gives [Kerala CET 2005]
A)
\[C{{H}_{3}}-C{{H}_{2}}-COOH\] done
clear
B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-N{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}-CO-COOH\] done
clear
D)
\[C{{H}_{3}}CO-CH=NOH\] done
clear
E)
\[C{{H}_{3}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-COOH\] done
clear
View Solution play_arrow
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question_answer177)
Which one does not give cannizzaro's reaction [Kerala CET 2005]
A)
Benzaldehyde done
clear
B)
2-methyl propanal done
clear
C)
p-methoxy benzaldehyde done
clear
D)
2,2 dimethyl propanal done
clear
E)
Formaldehyde done
clear
View Solution play_arrow