Description : (X) is the product of cross aldol condensation between benzaldehyde `(C_(6)H_(5)CHO)` and acetone. What is its structure ?
Last Answer : (X) is the product of cross aldol condensation between benzaldehyde `(C_(6)H_(5)CHO)` and acetone. What is its ... )-C=(CH_(3))_(2)` D. None of these
Description : Which of the following will undergo Aldol condensation? (a) Acetone (b) Benzaldehyde (c) Benzoic acid (c) Benzophenone
Last Answer : Acetone
Description : Acetone undergoes reduction with zinc amalgam in HCl to form propane. This reaction is known as (a) Clemmensen reduction (b) Wolf-Kishner reduction (c) Rosenmund reduction (d) Aldol condensation
Last Answer : Clemmensen reduction
Description : The conversion of secondary alcohol to ketones in presence of aluminium isopropoxide and acetone as solvent is? a. Canizarro reaction b. Oppenauer oxidation c. Suzuki reaction d. Aldol Condensation
Last Answer : b. Oppenauer oxidation
Description : Number of possible intra molecular aldol condensation product on heating with NaOH `H_(3)C-overset(O)overset(||)(C)-CH_(2)-CH_(2)-CH_(2)-overset(O)ove
Last Answer : Number of possible intra molecular aldol condensation product on heating with NaOH `H_(3)C-overset(O)overset(|| ... CH_(2)-overset(O)overset(||)(C)-H`
Description : `I_(2)` produced when ozone reacts with moist KI is used to convert `C_(2)H_(5)OH` to `CI_(3)CHO`. Number of moles of ozone required to convert 1 mole
Last Answer : `I_(2)` produced when ozone reacts with moist KI is used to convert `C_(2)H_(5)OH` to `CI_(3)CHO`. Number of ... CI_(3)CHO` is A. 1 B. 2 C. 4 D. 3
Description : Keto-enol tautomerism is shown by (a) Benzaldehyde (b) Acetone (c) Benzophenone (d) Acetic acid
Description : In the given reaction `{:(" "CH_(3)),(" |"),(H_(3)C-C-C-CHO),(" | ||"),(" "H_(3)C " "O):} overset("(i)Conc. NaOH")underset((ii)H^(+)) to` product is
Last Answer : In the given reaction `{:(" "CH_(3)),(" |"),(H_(3)C-C-C-CHO),(" | ||"),(" "H_(3)C " "O):} overset("(i) ... )C-C-C-CH_2),(" | ||"),(" "H_(3)C " "OH):}`
Description : In the scheme given below, the total number of intramolecular aldol condensation products formed from (Y) is
Last Answer : In the scheme given below, the total number of intramolecular aldol condensation products formed from (Y) is
Description : Total aldol condensation products (including stereosimers) formed by the reaction between acetaldehyde and acetophenone is :
Last Answer : Total aldol condensation products (including stereosimers) formed by the reaction between acetaldehyde and acetophenone is :
Description : Indicate the starting aldehyde or ketone from which each of the following compounds are formed by an aldol condensation reaction. (a)2-Ethyl-3-hydroxy
Last Answer : Indicate the starting aldehyde or ketone from which each of the following compounds are formed by an ... hexanal (b) 4-Hydroxy-4-methyl-2-pentanone
Description : Why does methanal not give aldol condensation while ethanol gives ?
Last Answer : Ans. This is because only those compounds which have hydrogen atoms can undergo aldol reaction. Ethanol possesses -hydrogen and undergoes aldol condensation. Methanal has no hydrogen atoms, hence does not undergo aldol condensation.
Description : Base-catalyzed condensation of two ester molecules to form an alcohol and β-keto ester is called (a) Claisen condensation (b) Corey-House reaction (c) Aldol condensation (d) Transesterification
Last Answer : Claisen condensation
Description : Which of the following statements describes the first step in the mechanism of the aldol condensation? (a) An alpha hydrogen is abstracted by the base to form an enolate anion. (b) A nucleophilic base attacks ... by the base ion. (d) The alpha hydrogen is abstracted by an acid to the enolate anion.
Last Answer : An alpha hydrogen is abstracted by the base to form an enolate anion
Description : When formaldehyde is treated with 50% NaOH solution, it undergoes (a) Cannizzaro reaction (b) Wurtz reaction (c) Aldol condensation (d) Hydrolysis
Last Answer : Cannizzaro reaction
Description : The reaction of a sodium alkoxide with an alkyl halide is called (a) Wurtz-Fittig reaction (b) Perkin reaction (c) Williamson's synthesis (d) Aldol condensation
Last Answer : Williamson's synthesis
Description : `C_(6)H_(5)NH_(2) overset(NaNO_(2)+HCl)underset(0-5^(@)C) X overset(H_(2)O)underset(Delta)toY,` the product is :
Last Answer : `C_(6)H_(5)NH_(2) overset(NaNO_(2)+HCl)underset(0-5^(@)C) X overset(H_(2)O) ... : A. Benzenediazonium chloride B. Nitrobenzene C. Phenol D. Cresol
Description : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to give Z the product obtained in the reactio
Last Answer : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to ... )H_(5)` D. `C_(2)H_(5)OC_(2)H_(5)`
Description : Oxidation of toluene with chromyl chloride gives benzaldehyde. This reaction is known as (a) Perkin reaction (b) Benzoin condensation (c) Etard's reaction (d) Ozonolysis
Last Answer : Etard's reaction
Description : What is the product when `C_(6)H_(5)CH_(2)NH_(2)` reacts with `HNO_(3)`?
Last Answer : What is the product when `C_(6)H_(5)CH_(2)NH_(2)` reacts with `HNO_(3)`?
Description : The product B of the following sequence of reactions is `C_(6)H_(5)CONH_(2) overset(Br_(2))underset(NaOH)toA overst(NaNO_(2)//HCl)underset(ul(" "0-5^(
Last Answer : The product B of the following sequence of reactions is `C_(6)H_(5)CONH_(2) overset(Br_(2))underset(NaOH)toA overst( ... 5^(@)C" "))toB` A. B. C. D.
Description : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find product
Last Answer : In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to ... A. Benzoic acid B. Benzaldehyde C. Benzamide D. Benzene
Description : The total number of cyclic structure as well as stereoisomers possible for a compound with the molecular formula `C_(5)H_(10)` is:
Last Answer : The total number of cyclic structure as well as stereoisomers possible for a compound with the molecular formula `C_(5)H_(10)` is:
Description : Which of the following structures correspond to the product expected, when excess of `C_(6)H_(6)` reacts with `CH_(2)Cl_(2)` in presence of anhydrous
Last Answer : Which of the following structures correspond to the product expected, when excess of `C_(6)H_(6)` reacts with ` ... anhydrous `AlCl_(3)`? A. B. C. D.
Description : The major product formed in the reaction: `overset(p-TsOH("Trace"))underset(C_(6)H_(6).Delta)rarr`
Last Answer : The major product formed in the reaction: `overset(p-TsOH("Trace"))underset(C_(6)H_(6).Delta)rarr` A. B. C. D.
Description : What is the structure of `(C_(4)H_(10)O)` which can give positive haloform test and evolves hydrogen gas with `LiAlH_(4)`
Last Answer : What is the structure of `(C_(4)H_(10)O)` which can give positive haloform test and evolves hydrogen gas ... (|)overset(CH_(3))overset(|)(C) - OH`
Description : Bisphenol A is produced by the condensation of acetone with (A) Formaldehyde (B) Ethyl alcohol (C) Diethyl ether (D) Phenol
Last Answer : (D) Phenol
Description : An aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed `C_(6)H_(5)NC`. The compound (Y) wa
Last Answer : An aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed `C_ ... 3)OH` D. `C_(6)H_(5)NH_(2)`
Description : In the given reaction sequence `C_(6)H_(5)-CH_(2)-NH_(2) overset(CHCl_(3)//Alc.KOH)underset(Delta)rarr [X] overset(H_(2)O //NaOH)rarr [Y],[Y]` will be
Last Answer : In the given reaction sequence `C_(6)H_(5)-CH_(2)-NH_(2) overset(CHCl_(3)//Alc.KOH)underset(Delta)rarr [X] ... -NH_(2)` D. `C_(6)H_(5)-CH_(2)OH`
Description : The end product (B) of the reaction sequence: `C_(2)H_(5)-underset(H)underset(|)(N)-CH_(3) overset(Ph-overset(O)overset(||)(C)-Cl)underset(NaOH)rarrA
Last Answer : The end product (B) of the reaction sequence: `C_(2)H_(5)-underset(H)underset(|)(N)-CH_(3) overset(Ph-overset ... )underset(H_(2)O)rarr B` A. B. C. D.
Description : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular formula `C_(3)H_(6)O_(2)`. X is most likely to be
Last Answer : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular ... Aldehye B. Alcohol C. Ether D. Both 2 and 3
Description : An alkene (A) `C_(16)H_(16)` on ozonolysis gives only one product (B) `C_8H_8O`. Compound (B) on reaction with NaOH/`I_(2)` yeilds sodium benzoate. Co
Last Answer : An alkene (A) `C_(16)H_(16)` on ozonolysis gives only one product (B) `C_8H_8O`. Compound (B) ... `(H_(2)//Pd-C)` gives a racemic mixture
Description : Fluorobenzene `(C_(6)H_(5)F)` can be synthesized in the laboratory .
Last Answer : Fluorobenzene `(C_(6)H_(5)F)` can be synthesized in the laboratory . A. from aniline by ... solution. D. by heating phenol with HF and KF.
Description : In the reaction, `C_(6)H_(5)NH_(2)underset(0-5^(@)C)overset(NaNO_(2)+HCl)rarr(A)underset(KCN)overset(CuCN)rarr(B)overset(H^(+)//H_(2)O)rarr(C)` the pr
Last Answer : In the reaction, `C_(6)H_(5)NH_(2)underset(0-5^(@)C)overset(NaNO_(2)+HCl)rarr(A)underset(KCN)overset(CuCN ... COOH` C. `C_(6)H_(5)OH` D. none of these
Description : In the given reaction which one of the following statement is correct - `C_(6)H_(5)-underset(CH_(3))underset(|)(C)=O+NH_(2)-OH to "Oxime" overset(PCl_
Last Answer : In the given reaction which one of the following statement is correct - `C_(6)H_(5)- ... elimination reaction. D. oxime and amides are isomers.
Description : `[NiCl_(2){P(C_(2)H_(5))_(2)(C_(6)H_(5))}_(2)]` exhibits temperature dependent magnetic behaviour. The coordination geometries of `Ni^(2+)` in the par
Last Answer : `[NiCl_(2){P(C_(2)H_(5))_(2)(C_(6)H_(5))}_(2)]` exhibits temperature dependent ... C. tetrahedral and square planar D. square planar and tetrahedral
Description : Arrange the carbanions, `(CH_(3))_(3)bar(C),bar(C)Cl_(3),(CH_(3))_(2)bar(C)H,C_(6)H_(5)bar(C)H_(2)`, in order of their decreasing stability
Last Answer : Arrange the carbanions, `(CH_(3))_(3)bar(C),bar(C)Cl_(3),(CH_(3))_(2)bar(C)H,C_(6)H_(5)bar(C)H_(2 ... (2)bar(C)HgtC_(6)H_(5)bar(C)H_(2)gtbar(C)Cl_(3)`
Description : The `S_(N^(1))` reactivity of the following halides will be in the order: (i) `(CH_(3))_(3)C-Br` (ii) `(C_(6)H_(5))CHBr` (iii) `(C_(6)H_(5))_(2)C(CH_(
Last Answer : The `S_(N^(1))` reactivity of the following halides will be in the order: (i) `(CH_(3))_(3)C-Br` (ii) `(C_ ... D. (iii) gt (ii) gt (i) gt (iv) gt (v)
Description : Consider the following carbocations : (I) `C_(6)H_(5)overset(+)(C )H_(2)` (II) `C_(6)H_(5)CH_(2)overset(+)(C )H_(2)` (III) `C_(6)H_(5)overset(+)(C )HC
Last Answer : Consider the following carbocations : (I) `C_(6)H_(5)overset(+)(C )H_(2)` (II) `C_(6)H_(5)CH_(2)overset(+ ... lt I lt II lt IV D. IV lt III lt I lt II
Description : Arragne basicity of the following compounds in decreasing order: `CH_(3)CH_(2)NH_(2)(I)," "H_(2)C=CH-NH_(2)(II),` `HC-=C-NH_(2)(III)," "C_(6)H_(5)NH_(
Last Answer : Arragne basicity of the following compounds in decreasing order: `CH_(3)CH_(2)NH_(2)(I), ... `IVgtIIIgtIIgtI` C. `IIIgtIIgtIgtIV` D. `IgtIIIgtIIgtIV`
Description : Which is decreasing order of acidity in, `HCOOH(I), CH_(3)COOH(II), CH_(3)CH_(2)COOH(III) and C_(6)H_(5)COOH(IV)`?
Last Answer : Which is decreasing order of acidity in, `HCOOH(I), CH_(3)COOH(II), CH_(3)CH_(2)COOH( ... B. `IVgtIIIgtIIgtI` C. `IVgtIgtIIgtIII` D. `IgtIVgtIIgtIII`
Description : `C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as intermediate, then various possible produ
Last Answer : `C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as ... (2)` C. `C_(6)H_(5)CN=NH` D.