Q.1.
When an aldehyde was heated with alkali, a part of it was conveted into alcohol and a part of itto an acid. The aldehyde is
-
43%
a) an aromatic aldehyde or HCHO
-
43%
b) an aromatic aldehyde other than salicylaldehyde
-
0%
c) an aliphatic aldehyde other than HCHO
-
14%
d) an aliphatic aldehyde or salicylaldehyde
Q.2.
on Q272) Identify Z in the series
-
20%
a) CHCl2.CO.O.COCH3
-
40%
b) CH3.CO.CH2COONa
-
40%
c) CH2Cl.CO.O.COCH3
-
0%
d) (CH3CO)2O
Q.3.
Which of the following reaction cannot be used for the reduction of R2CO → R2CH2 [ Roorke 1993]
-
20%
a) Clemmensen reduction
-
20%
b) Wolff-Kishner reduction
-
20%
c) Wurtz reaction
-
40%
d) HI/ red P at 200°C
Q.4.
on More Than One Correct Answer Q274) The reaction give below is carried out by
-
0%
a) P + HI
-
40%
b) NaBH4
-
20%
c) Wolff-Kishner reduction
-
40%
d) Clemmensen reduction
Q.5.
At room temperature formaldehyde is
-
0%
a) Solid
-
57%
b) Liquid
-
43%
c) Gas
-
0%
d) None of the above
Q.6.
Which gives a ketone with Grignard reagent?
-
25%
a) Methyl cyanide
-
25%
b) Formaldehyde
-
25%
c) Ethyl alcohol
-
25%
d) Methyl iodide
Q.7.
han One Correct Answers Q277) Which is/are less acidic than phenol?
-
0%
a) H2O
-
75%
b) o-nitrophenol
-
25%
c) CH3OH
-
0%
d) o-cresol
Q.8.
Benzaldehyde reacts with methyl amine to give
-
0%
a) C6H5CONH2
-
25%
b) C6H5CH=NCH3
-
75%
c) C6H5NH2
-
0%
d) C6H5CH2NH2
Q.9.
Ethanol vapours are passed over heated copper at 300°C and product is treated with aqueous NaOH. The final product is
-
0%
a) aldol
-
75%
b) β-hydroxy butyraldehyde
-
25%
c) both a and b
-
0%
d) none of the above
Explanation
Q.10.
han One Correct Answer Q280) Benzaldehyde react(s) with conc. NaOH to give
-
0%
a) benzyl alcohol
-
50%
b) phenol
-
50%
c) sodium benzoate
-
0%
d) none of these
Q.11.
Which of the following will be most readily dehydrated in acidic conditions? [IIT 2000]
-
0%
a)
-
50%
b)
-
50%
c)
-
0%
d)
Explanation
Q.12.
Aldehydes are produced in atmosphere by
-
25%
a) oxidation of secondary alcohols
-
0%
b) reduction of alkenes
-
50%
c) reaction of oxygen atoms with hydrocarbons
-
25%
d) reaction of oxygen atom with O3
Q.13.
Aldol condensation of aldehyde and ketones takes place through the formation of
-
20%
a) free radical
-
20%
b) nucleophile
-
20%
c) electrophile
-
40%
d) carbne
Explanation
Q.14.
Which of the following compounds gives a ketone with Grignard's reagent?
-
40%
a) Methyl iodide
-
0%
b) Formaldehyde
-
60%
c) Ethyl alcohol
-
0%
d) Ethane nitrile
Explanation
Q.15.
If acetyl chloride is reduced in the presence of BaSO4, S and Pd, then
-
25%
a) CH3COCH3 is formed
-
25%
b) CH3CHO is formed
-
25%
c) CH3COOH is formed
-
25%
d) CH3CH2OH is formed
Explanation
Q.16.
han One Correct Answer Q286) Which statement(s) is /are correct in the case of acetaldehyde and acetone?
-
0%
a) Both react with hydrazine
-
0%
b) Both react with NaHSO4
-
100%
c) Both react with hydroxylamine
-
0%
d) None of the above
Q.17.
Oxidation of toluene to benzaldehyde by use of chromyl chloride is called ... ...[ karnataka CET 1997]
-
20%
a) Wurts reaction
-
60%
b) Etard's reaction
-
0%
c) Fitting reaction
-
20%
d) Rosenmund's reaction
Explanation
Q.18.
The molecular formula of chlorinated acetone produced in the distillation with bleaching powder is
-
25%
a) CCl3COCl3
-
75%
b) CH2ClCOOH
-
0%
c) CH3COCl
-
0%
d) CCl3COCH3
Q.19.
cetal is produced by reacting alcohol in the presence of dry HCl with ... .... [ MP PET 1996]
-
20%
a) Ketone
-
20%
b) Carboxylic acid
-
40%
c) Acetaldehyde
-
20%
d) Ether
Explanation
Q.20.
Cannizzaro reaction is not given by ... ..[ Punjab CET 1996]
-
0%
a) Acetaldehyde
-
50%
b) Formaldehyde
-
50%
c) Trimetyl acetaldehyde
-
0%
d) Benzaldehyde
Q.21.
Which of the following gives aldol condensation reaction?
-
0%
a) C6H5OH
-
40%
b) C6H2-CO-C6H5
-
20%
c) CH3CH2-CO-CH3
-
40%
d) (CH3)3-COH
Q.22.
on Q292) Identify X
-
0%
a) CH3C(OH)(CH3)2
-
50%
b) CH3CH2OH
-
50%
c) CH3OH
-
0%
d) CH3CHOHCH3
Q.23.
han One Correct Answer Q293) Ethane can be prepared from ethanal in one step by the use of
-
33%
a) zinc amalgam and conc. HCl
-
50%
b) amalgamated zinc and hydrochloric acid ) or red P and HI)
-
0%
c) lithium aluminium hydride in ether
-
17%
d) none of the above
Q.24.
The IUPAC name of crotonaldehyde is
-
20%
a) propenal
-
60%
b) but-2-en-1-al
-
0%
c) butan-2-en-al
-
20%
d) none of these
Q.25.
Acetone is prepared by
-
0%
a) Oxidation of n-propyl alcohol
-
50%
b) Pyrolysis of calcium acetate as well as acetic acid
-
0%
c) Pyrolysis of calcium acetate
-
50%
d) Oxidation of acetaldehyde
Q.26.
on Q296) In the following reaction sequence, the correct structures of E, F and G are
-
50%
a)
-
50%
b)
-
0%
c)
-
0%
d)
Explanation
Q.27.
han One Correct Answers Q297) With reference to the scheme given, which of the given state(s) about T, U, V and W is(are correct? [ IIT 2012]
-
25%
a) T is soluble in hot aqeuous NaoH
-
25%
b) U is optically active
-
0%
c) Molecular formula of W is C10H18O4
-
50%
d) V gives effervescence on treatment with aqueous NaHCO3
Q.28.
Which of the following statements regarding chemical properties of acetophenone are wrong? It is reduced to methyl phenyl carbinol by sodium and ethanol It is oxidised to benzoic acid with acidified KMnO4 It does not undergo electrophilic substitution like nitration at meta-position It does not undergo iodoform reaction with iodine and alkali ... ... [ Tamil Nadu CET 2001]
-
0%
a) 1 and 2
-
25%
b) 2 and 4
-
50%
c) 3 and 4
-
25%
d) 1 and 2
Q.29.
Which of the following reactions is used for detecting presence of carbonyl group?
-
0%
a) Reaction with phenyl hydrazine
-
0%
b) Reaction with hydrazine
-
40%
c) Reaction with hydroxylamine
-
60%
d) All
Q.30.
on Q300)
-
50%
a)
-
0%
b)
-
50%
c)
-
0%
d)
Explanation
