Q.1
A substance C4H10O yields on oxidation compound C4H8O which gives an oxime and a positive iodoform test. The original substance on treatment with conc. H2SO4 gives C4HThe structure of the compound is
  • a) CH3CH2 - O - CH2CH3
  • b) (CH3)3COH
  • c) CH3CH(OH)CH2CH3
  • d) CH3CH2CH2CH2OH
Q.2
han One Correct Answer Q212) Which will react with acetone to give a product containing >C=N, linkage?
  • a) (CH3)3N
  • b) C6H5NHNH2
  • c) NH2CONHNH2
  • d) C6H5NHC6H5
Q.3
The reagent with which both aldehydes and ketones react is ... ... [ IIT 1981]
  • a) Gehling solution
  • b) Grignard's reagent
  • c) Schiff's reagent
  • d) Tollen's reagent
Q.4
Silver mirror is a test for
  • a) Aldehyde
  • b) Thioalcohols
  • c) Acids
  • d) Ethar
Q.5
C6H5CHO + HCN → C6H5CH(CN)OH. The product would be
  • a) meso compound
  • b) optically active
  • c) racemate
  • d) mixture of diastereomers
Q.6
Formaldehyde can be distinguished from acetaldehyde by
  • a) Ammoniacal AgNO3
  • b) Ammonia
  • c) Fehling's solution
  • d) Schiff's reagent
Q.7
han One Correct Answers Q217) Which is/are isomer(s)?
  • a) Propionic acid and ethyl acetate
  • b) Propionaldehyde and acetone
  • c) Urea and ammonium cyanate
  • d) Xylenes
Q.8
Catalyst SnCl2/HCl is used in
  • a) Cannizzaro reaction
  • b) Clemmensen reduction
  • c) Rosenmnd's reaction
  • d) Stephen's reaction
Q.9
Between p-nitrophenol and salicylaldehyde, solubility in base is
  • a) equal in nature
  • b) higher for salicylaldehyde
  • c) almost nil in both cases
  • d) higher in p-nitrophenol
Q.10
At room temperature formaldehyde is
  • a) liquid
  • b) solid
  • c) gas
  • d) none of these
Q.11
on Q221) The appropriate reagent for transformation
ch-28_que_no-221_img_no1.png
  • a) Zn(Hg), HCl
  • b) NH2NH2, OH-
  • c) H2/Ni
  • d) NaBH4
Q.12
Ketones are less reactive than aldehydes because
  • a) of electromeric effect
  • b) of steric hindrance to the attacking reagent
  • c) C=O group is less polar in ketones
  • d) none of the above
Q.13
Pinacole is
  • a) 3-methyl butan-2-ol
  • b) 2,3-dimethyl-2,3-butandiol
  • c) 3,3-dimethyl-2-propanone
  • d) none of the above
Q.14
Fehling solution is a mixture of two solutions. While one solution contains CuSO4, the other contains
  • a)
    ch-28_qn-224choice_img_no1.png
  • b)
    ch-28_qn-224choice_img_no2.png
  • c)
    ch-28_qn-224choice_img_no3.png
  • d)
    ch-28_qn-224choice_img_no4.png
Q.15
on Q225) The above reaction is known as
ch-28_que_no-225_img_no1.png
  • a) Beckmann rearrangement
  • b) Benzilic acid rearangement
  • c) Benzoin condensation
  • d) Aldol condensation
Q.16
han One Correct Answer Q226) Which of the following do not undergo base-catalysed aldol condensation?
  • a) p-methylbenzaldehyde
  • b) 2-methylpropionaldehyde
  • c) 2,2-dimethylpropionaldehyde
  • d) Benzaldehyde
Q.17
Which of the following products is formed when benzaldhyde is treated with CH3MgBr and the addition product so obtained is subjected to acid hydrolysis? ... ..[ HArryana EET 2000 ]
  • a) Secondary alcohol
  • b) Primary alcohol
  • c) phenol
  • d) tert- butyl alcohol
Q.18
The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are)
  • a) Aqueous solution of NaHSO3
  • b) Benedict reagent
  • c) 2, 4 -dinitrophenyl hydrazine
  • d) I2 and Na2CO3
Q.19
Paraldehyde is used as a
  • a) saporific
  • b) poison
  • c) polymer
  • d) dye
Q.20
Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4 or LiAlH4? [ Punjab CET 1990]
  • a) 1_propanol
  • b) 2-Propanol
  • c) 2-Methyl-2-Propanol
  • d) Ethanol
Q.21
on Q231) Predict the product 'B' in the sequence of reaction
ch-28_que_no-231_img_no1.png
  • a) CH3COOH
  • b) CH3CHO
  • c) CH3COONa
  • d) CH3CH(OH)CH2CHO
Q.22
Paraldehyde is
  • a) a trimer of formaldehyde
  • b) a trimer of acetaldehyde
  • c) a hexamer of formaldehyde
  • d) a hexamer of acetaldehyde
Q.23
han One Correct Answer Q233) The silver mirror with Tollens reagent is formed by
  • a) acetone
  • b) ethanal
  • c) ethyl acetate
  • d) glucose
Q.24
Partial oxidation of methane gives
  • a) HCOOH
  • b) H2O and CO2
  • c) HCHO
  • d) CO and H2O
Q.25
Cyanohydrin of which of the following forms lactic acid?
  • a) CH3CH2CHO
  • b) CH3CHO
  • c) CH3COCH3
  • d) HCHO
Q.26
The increasing order of the rate of HCN addition to compounds A to D is A) HCHO    B) CH3COCH3 C) PhCOCH3   D) PhCOPh ... ...[ AIEEE 2006]
  • a) A < B < C < D
  • b) D < B < C < A
  • c) D < C < B < A
  • d) C < D < B < A
Q.27
Aliphatic aldehydes react with Fehling's solution to give red ppt. but benzaldehyde does not produce red ppt with Fehling's solution because
  • a) of bulky ring, -CHO is hinderer
  • b) of resonance, oxidation of benzaldehyde is difficult
  • c) - CHO is present in cyclic structure
  • d) of all the above
Q.28
on Q238) the product X is
ch-28_que_no-238_img_no1.png
  • a) CH3OH + CH3OH
  • b) CH2OH - COO-
  • c) CH3OH + HCOOH
  • d) OOC - COO-
Q.29
The decreasing order of solubility of methanal (A), propanaldehyde (B), benzaldehyde (C) and acetophenone (D)
  • a) A > B > C > D
  • b) D > C > D > A
  • c) D > A > B > C
  • d) B > A > C > D
Q.30
Propanal on treatment with dilute sodium hydroxide forms
  • a) CH3CH2COONa
  • b) CH3CH2CH2CH2CH2CHO
  • c) CH3CH2CH(OH)CH(CH3)CHO
  • d) CH3CH2CH(OH)CH2CH2CHO
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