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IIT JEE Aldehydes And Ketones
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1. Aromatic aldehydes react with primary amines to form
Amino acids
Schiffs base
Pyrosole
Pyridine.
2. On heating a mixture of calcium formate and calcium propanoate??is obtained
propanal
butanone
propane
propanoic acid
3. Which of the following does not reduce Fehling?s solution?
Formaldehyde
Paraldehyde
Propanal
Acetaldehyde
4. Acetaldehyde when treated with ethyl alcohol in the presence of dil HCl gives
formaldehyde
crotonaldehyde
propanal
acetal
5. Calcium formate of heating gives
formic acid
banzaldehyde
methanoic
anhydrideformaldehyde
6. Calcium acetate on heating gives
ethane
pentane
acetic anhydride
acetone
7. Which of the following does not have alpha hydrogen?
Formaldehyde
Acetone
Benzaldehyde
Phenyl acetaldehyde
8. Shape of the carboxyl group is
tetrahedral
pyramidal
planar triangular
octahedral
9. Which of the following is used in medicine as a hypnotic?
Paraformaldehyde
Acetaldehyde
Methaldehyde
Paraldehyde
10. Which of the following is a sedative?
Paraformaldehyde
Benzaldehyde
Metaldehyde
Paraldehyde
11. Calcium salt of propionic acid is distilled in dry conditions. The product formed will show
Fehling test positive
Iodoform test negative
Victor Meyer test positive
Tollens test positive.
12. Which of the following can reduce Tollens reagent but no Fehlings soln.?
Benzaldehyde
Acetaldehyde
Formaldehyde
Acetone
13. IUPAC name of crotanaldehyde is
2 methyl propanol
isobutynaldehyde
2 Butanal
1 Butanal
14. Etards reaction involves the preparation of benzaldehyde from
Toluene
Ethyl benzene
Benzoyl chloride
Sodium benzoate.
15. Oxidation of secondary alcohol to ketone with aluminium tert. butanide is known as
Meerwein Pondorff Verley reaction
Oppenauer oxidation
Kolbes reaction
Stephens reaction
16. Trimer of formaldehyde is known as
metaformaldehyde
trioxymethylene
trioxane
All the above
17. Ethylidene chloride is hydrolysed with aqueous NaOH. The product formed is
Ethanol
Ethylchloride
Ethanal
Ehtane.
18. A mixture of acetic acid and formic acid is passed over MnO at 303 degreeCentigrade. The product obtained is
benzaldehyde
acetaldehyde
methane
All the above
19. Methyl cyanide is dissolved in ethyl formate and reduced with stannous chloride and hydrochloric acid. The product is then steam distilled. The distillate will be
ethyl amine
formaldehyde
methyl alcohol
acetaldehyde
20. Which of the following is obtained from pyryligenenous acid?
Benzaldehyde
Acetaldehyde
Formaldehyde
Acetone
21. Which of the following is a hypnotic?
Acetaldehyde
Metaldehyde
Paraldehyde
None of these
22. Which of the following is liquid at room temperature?
Metaldehyde
Trioxane
Polyoxymethylenes
Paraldehyde
23. Which of the following is the most reactive?
Propanal
Propanone
Propane
Methoxy ethane
24. Which of the following will not reduce Tollens reagent?
Acetone
Acetaldehyde
Formaldehyde
Benzaldehyde
25. Which of the following groups can occur at the end of the chain only?
Ether
Alcohol
Aldehyde
Ketone
26. Which of the following will give an aldehyde on oxidation?
Methoxy ethane
2 methanal
2 methyl propane
1 propanal
27. Mesitylene is
1 3 4 trimethyl benzene
1 3 5 trimethyl benzene
2 2 4 trimethyl benzene
2 3 5 trimethyl benzene
28. Oximes are isomeric with
acids
ketones
amides
aldehydes
29. Acetone when distilled with conc. sulphuric acid gives
diacetone alcohol
mesitylene
mesityl oxide
toluene
30. Vinyl alcohol and ehtanal are
Metamers
Tautomers
Position isomers
Chain isomers.
31. Which of the following does not undergo benzoin condensation ?
Benzene caebaldehye
p-Toluene carbaldehye
Phenylethanal
4-Methoxybenzaldehyde.
32. Which of the following will not form when the mixture of calcium acetate and calciumformate is distilled ?
Acetone
Propanal
Ethanal
Methanal.
33. Bimolecular reduction of acetone gives
Diacetone amine
Pinacol
Chloretone
Propane.
34. Which of the following compound will not undergo Cannizzaros reaction ?
Benzaldehyde
2 2-Dimethyl propanal
Formaldehyde
Phenylethanal.
35. Clemmensens reduction will convert cyclobutanone to
Cyclobutanol
Cyclobutyraldehye
n-Butane
Cyclobutane.
36. 2-Pentanone and 3-Methylbutan-2-one are
optical isomers
geometrical isomers
metamers
tautomers.
37. One mole of an organic compound is found to require only 0.5 mole of oxygen to produce an acid. Which class of compound does the starting meterial belong to ?
Alcohol
Aldehyde
Ether
Ketone
38. Benzaldehyde and malonic acid react to give
Ethanal
Crotonic acid
Cinnamaldehyde
Cinnamic acid.
39. The main point of similarity between Etards reaction and Vilsmeyer reaction is
Starting reagent is benzene
Final product in both is benzaldehyde
Oxidising agent in both is chromyl chloride
Both form ketone as product.
40. Which of the following compounds will react with ethanolic KCN?
Ethane
Acetone
Chlorobenzene
Benzaldehyde.
41. Which of the following name is associated with the reduction of aldehyde/ketone by using the reagent aluminium isopropoxide ?
wolff Kishner
Meerwein Ponndroff-Verley
Wagner-Meerwein
Michael.
42. The reaction of acetaldehyde and acetone in the presence of dilute alkali is called
Crossed aldol condensation
Perkins condensation
aldol condensation
benzoin condensation
43. Which aming the following gives positive iodoform test as well as positive Fehling testAcetophenone.
Propanal
Ethanal
Propanone
Acetophenone.
44. Cannizaro reaction involves
Oxidation of aldehydes
Oxidation as well reduction of aldehyde molecule
Reduction of aldehyde molecule
Rearrangement in aldehyde molecule.
45. Which of the following ketone will not respond to iodoform test?
3-Methylbutan-2-one
Ethyl isopropylketone
Methyl phenyl ketone
Dimethyl ketone.
46. When benzyl methyl ketone is allowed to react with ethylene glycol in benzene the product formed is
2-Benzyl methyl dimethylene-1 3-dioxolane
Benzyl glycolone
Benzyl alcohol
1 3-Dioxolactic acid
47. Which of the following aldehyde will undergo Cannizzaros reaction?
Ethanal
2-Methylpropanal
2 2-Dimethylpropanal
Phenylacetaldehyde.
48. Which ketone will form 3-ethylpentan-3-ol on treatment with ethyl magnesium bromide.
Acetone
Ethylmethyl ketone
Acetophenone
Diethyl ketone.
49. Which of the following will show disproportionation when treated with 50% aqueous NaOH?
Benzyl alcohol
Ethanal
Phenyl ethanal
m-nitro benzaldehyde.
50. Which of the following is enolisable.
Benzophenone
2 4-Pentanedione
Phenyl-t butyl ketone
All of the above.
51. m-Chlorobenzaldehyde on reaction with conc. KOH at room temperature gives
Potassium meta chlorobenzoate and m-Hydroxy benzaldehyde
m-Hydroxybenzaldehyde and m-chlorobenzyalcohol
m-Chlorobenzyl alcohol and m-Hydroxy benzylalcohol
Potassium m-chlorobenzoate and m-Chlorobenzylalcohol.
52. The adduct of ethyl magnesium iodide and methanal is hydrolysed. The final product is
1-Propanol
2-Propanol
Ethanol
2-Chlor1-propanol.
53. The compound having least solubility in water isMethanalAcetone
Methanal
Acetaldehyde
Acetone
Acetophenone.
54. Which of following possesses highest value of dipole moment ?
1-Butene
Butanal
Trans 2-Butene
2-Butanone.
55. Ehtananl is treated with ammonia and adduct formed is warmed. The final product is
Acetaldehyde ammonia
Acetaldimine
Tetramethylene hexamine
Ethyl amine.
56. The product of chemical reaction between benzaldehyde and alcoholic KCN is commonly called
Aldol
Acetal
Phoron
Benzoin.
57. In order to prepare acetone from acetyl chloride in one step which of the following reagent will be best?
HI
Diethyl candmium
Methyl magnesium bromide
Dimethyl cadmium.
58. Which of the following is capable of acting as hypnotic ?
Acetaldehyde
Metaldehyde
Paraldehyde
Formaldehyde.
59. Hypnone is commercial name of
Methyl phenyl ketone
Acetone
Benzopheneone
Diethyl ketone.
60. Pinacolone is
1-phenyl-2-propanone
3 3-Dimethyl-2-butanone
2 3-dimethyl-2 3-butanediol
2 3-Dimethyl but-2-ene.
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