JEE-ADVANCED SERIES Chemistry
Aldehydes Ketones And Carboxylic Acids
22 previous year questions.
Volume: 22 Ques
Yield: High
High-Yield Trend
3
2024 1
2013 3
2012 1
2011 1
2006 1
2003 2
2000 4
1998 1
1996 1
1992 2
1984 2
1983 Chapter Questions 22 MCQs
01
PYQ 1983
medium
chemistry ID: jee-adva
When ethanal is treated with Fehling's solution, it gives a precipitate of
1
2
3
4
02
PYQ 1983
medium
chemistry ID: jee-adva
Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?
1
2
Sodalime
3
Hot conc.
4
03
PYQ 1984
medium
chemistry ID: jee-adva
Which of the following compounds will give a yellow precipitate with iodine and alkali ?
1
Methyl acetate
2
Acetamide
3
2-Hydroxypropane
4
Acetophenone
04
PYQ 1984
medium
chemistry ID: jee-adva
Base catalysed aldol condensation occurs with
1
propionaldehyde
2
benzaldehyde
3
2-methyl propionaldehyde
4
2, 2-dimethyl propionaldehyde
05
PYQ 1992
medium
chemistry ID: jee-adva
Hydrogenation of benzoyl chloride in presence of on gives
1
benzyl alcohol
2
benzaldehyde
3
benzoicacid
4
phenol
06
PYQ 1996
medium
chemistry ID: jee-adva
If is the fraction of HI dissociated at equilibrium in the reaction, starting with the 2 moles of HI, then the total number of moles of reactants and products at equilibrium are
1
2
2
3
4
07
PYQ 1998
medium
chemistry ID: jee-adva
Which of the following will undergo aldol condensation?
1
Acetaldehyde
2
Propanaldehyde
3
Benzaldehyde
4
Trideutero acetaldehyde
08
PYQ 1998
medium
chemistry ID: jee-adva
If and are the respective equilibrium constants for the two reactions, The equilibrium constant of the reaction,
1
2
3
4
09
PYQ 1998
medium
chemistry ID: jee-adva
A new carbon-carbon bond formation is possible in
1
Cannizzaro's reaction
2
Friedel-Crafts- reaction
3
Clemmensen- reduction
4
Reimer-Tiemann reaction
10
PYQ 1998
medium
chemistry ID: jee-adva
A new carbon-carbon bond formation is possible in
1
Cannizzaro's reaction
2
Friedel-Craft's alkylation
3
Clemmensen reduction
4
Reimer-Tiemann reaction
11
PYQ 2000
medium
chemistry ID: jee-adva
For the equilibrium, which of the following expressions is correct ?
1
2
3
4
12
PYQ 2000
medium
chemistry ID: jee-adva
Benzoyl chloride is prepared from benzoic acid by
1
2
3
4
13
PYQ 2003
medium
chemistry ID: jee-adva
An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon.The ester formed will be
1
optically active mixture
2
pure enantiomer
3
meso compound
4
racemic mixture
14
PYQ 2006
medium
chemistry ID: jee-adva
The smallest ketone and its next homologue are reacted with to form oxime
1
two different oximes are formed
2
three different oximes are formed
3
two oximes are optically active
4
all oximes are optically active
15
PYQ 2011
easy
chemistry ID: jee-adva
Among the following compounds, the most acidic is
1
-nitrophenol
2
-hydroxybenzoic acid
3
-hydroxybenzoic acid
4
-toluic acid
16
PYQ 2012
medium
chemistry ID: jee-adva
Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme.
1
and
2
and
3
and
4
and
17
PYQ 2012
medium
chemistry ID: jee-adva
The compound that undergoes decarboxylation most readily under mild condition is
1
2
3
4
18
PYQ 2012
medium
chemistry ID: jee-adva
The carboxyl functional group is present in
1
picric acid
2
barbituric acid
3
ascorbic acid
4
aspirin
19
PYQ 2013
medium
chemistry ID: jee-adva
Among and , the aromatic compounds(s) is/are
1
P
2
Q
3
R
4
S
20
PYQ 2024
easy
chemistry ID: jee-adva
An organic compound P having molecular formula C6H6O3 gives ferric chloride test and does not have intramolecular hydrogen bond. The compound P reacts with 3 equivalents of NH2OH to produce oxime Q. Treatment of P with excess methyl iodide in the presence of KOH produces compound R as the major product. Reaction of R with excess iso-butylmagnesium bromide followed by treatment with H3O+ gives compound S as the major product.
The total number of methyl (−CH3) group(s) in compound S is ____.
The total number of methyl (−CH3) group(s) in compound S is ____.
21
PYQ 2024
easy
chemistry ID: jee-adva
In the following reaction sequence, the major product Q is
1
2
3
4
22
PYQ 2024
medium
chemistry ID: jee-adva
Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. NaOH solution, gives P and Q. Compound P does not give Tollens' test, whereas Q on acidification gives positive Tollens' test. Treatment of P with excess cyclohexanone in the presence of catalytic amount of p-toluenesulfonic acid (PTSA) gives product R.
Sum of the number of methylene groups (-CH2-) and oxygen atoms in R is _______
Sum of the number of methylene groups (-CH2-) and oxygen atoms in R is _______