Lacrymator or tear gas is:

  • C6H5COCl                               

  • C6H5OC6H5

  • C6H5COCH2Cl                         

  • C6H5COCH3

The correct acidity order of the following is:

  • (III)>(IV)>(II)>(I)                       

  • (IV)>(III)>(I)>(II)

  • (III)>(II)>(I)>(IV)                       

  • (II)>(III)>(IV)>(I)  

Acetone reacts with iodine (I2) to form iodoform in the presence of      

  • CaCO3   

  • NaOH     

  • KOH     

  • MgCO3

Generally Aldehydes behave as:

  • Oxidising agent

  • Reducing agent

  • Dehydration agent

  • Oxidizing as well as reducing agent

Compound (A) C5H10O forms a phenyl hydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) is:

  • a primary alcohol

  • an aldehyde

  • a ketone

  • a secondary alcohol 

RCOOH →RCH2OH. This mode of reduction of an acid to alcohol can be affected only by:

 

  • Zn/HCl

  • Na-alcohol

  • aluminium isopropoxide and isopropyl alcohol

  • LiAlH4

Ethyl ester →ExcessCH3MgBr P. the product P will be: 

  •  

  •  

  •  

Which of the following has most acidic proton?

  • CH3COCH3                             

  • (CH3)2C=CH2

  • CH3COCH2COCH3                   

  • (CH3.CO)3CH

Which one of the following can be oxidised to the corresponding carbonyl compound?   [2004]

  • 2-hydroxy propane

  • Ortho-nitro phenol

  • propane

  • 2-methyl-2-hydroxy propane

Polarisation of electrons in acrolein may be written as             

 

  •  Cδ+H2=CH-CH=Oδ-

  •  Cδ+H2=Cδ+H-CH=O

  •  Cδ+H2=CH-CH=Oδ+

  •  Cδ+H2=CH-Cδ+H=O

Consider the following reaction;

CH3Br + Mg →EtherA→HCHOB→HOHC

compound C is:

  • acetic acid

  • acetaldehyde

  • ethyl alcohol

  • formic acid

The conversion of CH3OH to CH3COOH can be brought in by:

  • K2Cr2O7/H+                           

  • CO + Rh

  • KMnO4                                   

  • H3PO4

Benzaldehyde and acetaldehyde can be distinguished by:

  • iodoform test

  • 2,4 - DNP test

  •  NH3 reaction

  • Wolff-Kishner's reduction

Fehling's solution is:

  • Acidified copper sulphate solution

  • Ammoniacal cuprous chloride solution

  • Copper sulphate, Rochelle salt + NaOH

  • None of the above

Which compounds will not reduce Fehling's solution?

  • Methanal                                 

  • Ethanal

  • Trichloroethanal                       

  • Benzaldehyde

Acetaldehyde normally reacts with                

  • only electrophiles

  • only nucleophiles

  • only free radicals

  • both electrophiles and nucleophiles

Muscone (an explosive perfume secreted by musk deer) has the structure

Structural formula of muscone

 . Its IUPAC name is:

 

  • 3-methyl cyclopentadecanone

  • methyl cyclopentadecan-3-one

  • 3-methyl cyclotetradecanone

  • 3-methyl cyclohexadecan-3-one

Which of the following has most acidic hydrogen?

  • 3-hexanone                         

  • 2,4-hexanedione

  • 2,5-hexanedione                   

  • 2,3-hexanedione

Which can be reduced to corresponding hydrocarbon by Zn-Hg/conc HCl?

  • Butan-2-one

  • Acetic acid

  • Acetamide

  • Ethyl acetate

Nucleophilic addition reaction will be most favoured in                   [2006]

  •                          O                        ∥CH3-CH2-CH2C-CH3

  •  (CH3)2C=O

  •  CH3CH2CHO

  •  CH3CHO

The enolic form of acetone contains:

 

 

  • 9 σ-bonds, 1π-bond and 2 lone pairs

  • 8 σ-bonds, 2π-bonds and 2 lone pairs

  • 10 σ-bonds, 1π-bond and 1 lone pair

  • 9 σ-bonds, 2π-bonds and 1 lone pair

In this reaction,

CH3CHO + HCN →CH3CH(OH)CN →H.OHCH3CH(OH)COOH

an asymmetric compound is generated. The acid obtained would be            

  • 50% D + 50% L-isomer

  • 20% D + 80% L-isomer

  • D-isomer

  • L-isomer

Ethane can be obtained from ethanal in one step by:

 

  • Na-Hg + water

  • Zn-Hg + conc.HCl

  • aluminium isopropoxide and isopropyl alcohol

  • LiAlH4 + ether

Which one of the following compounds on treatment with LiAlH4 will give a product that will give a positive iodoform test?

  • CH3CH2CHO                             

  • CH3CH2COOCH3

  • CH3CH2OCH2CH3                      

  • CH3COCH3

Aldehydes and ketones will not form crystalline derivatives with                   

  • sodium bisulphite

  • phenyl hydrazine

  • semicarbazide hydrochloride

  • dihydrogen sodium phosphate

Oxalic acid on treatment with conc. H2SO4 gives:

  • CO + H2O2                           

  •   H2O +CO+CO2

  • HCOOH + CO2                       

  •   HCOOH + CO2 +O2

Benzene sulphonic acid on treating with P2O5 gives:

 

  • salicylic acid 

  • benzoic acid

  • acid anhydride

  • sodium benzoate

The IUPAC name of crotonaldehyde is:

  • But-2-en-1-al

  •  Prop-2-enal

  •  4-Methylpent-3-en-2-one

  • None of the above

The IUPAC name of tartaric acid is:

  • 2,3-dihydroxy butane-1, 4-dioic acid

  • 1,4-dihydroxy butane-2-3-dioic acid

  • butane-1 4-dicarboxylic acid

  • none of the above

Cyanohydrin of which compound gives lactic acid on hydrolysis?

  • Acetone                                 

  • Acetaldehyde

  • Propanal                                 

  • HCHO

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