The compound obtained from meadow sweet is :
- ✓Salicyl aldehyde
- BCinnamaldehyde
- CValeraldehyde
- DVanillin
Answer: A.
View full solution →Question types
Aldehydes, Ketones and Carboxylic Acids question types
238 questions across 7 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
238
Questions
7
Question groups
5
Question types
01
M.C.Q [1M]
51 Q→02Fill in the blank. [1M]
12 Q→031 Marks Question
118 Q→04Short Answer Type Questions [2M]
31 Q→053 Marks Question
13 Q→06Long Answer Type Questions [5M]
12 Q→074 Marks Questions
1 Q→Sample Questions
Aldehydes, Ketones and Carboxylic Acids questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Change occurs in hybridisation state of carbonyl carbon in nucleophilic addition reaction is :
- A$sp ^2$ to sp
- Bsp to $sp ^2$
- ✓$sp ^2$ to $sp ^3$
- D$sp ^3$ to $sp ^2$
Answer: C.
View full solution →IUPAC name of 
- APhthalic acid
- ✓Benzene-1, 2-dicarboxylic acid
- CBenzene-1, 2-dioic acid
- DPhenyl-1, 2-dicarboxylic acid
Answer: B.
View full solution →Aldehydes and ketones react with hydroxyl amine to form :
- AHydrogen
- BCyanohydrin
- CSemi-carbazone
- ✓Oxime
Answer: D.
View full solution →Which of the following compound reduces Tollens' reagent?
- A$CH _3 COOH$
- B$CH _3 COCH _3$
- ✓HCOOH
- D$C _6 H _5 COOH$
Answer: C.
View full solution →Fehling solution A consists of an aqueous solution of _________________ .
Sodium benzoate is used as _______________ .
Ammonical silver nitrate solution is called _______________ .
The-CHO group in benzaldehyde is ____________ directing for electrophilic reactions.
How will you convert ethanal into the compound :
But-2-enoic acid
But-2-enoic acid
How will you convert ethanal into the compound :
But-2-enal
But-2-enal
How will you convert ethanal into the compound :
Butane-1-3-diol
Butane-1-3-diol
Which of the compound would undergo aldol condensation, which the Cannizzaro reaction and which neither write the structure of the expected product of aldol condensation and Cannizzaro reaction :
Butan-1-ol
Butan-1-ol
Which of the compound would undergo aldol condensation, which the Cannizzaro reaction and which neither write the structure of the expected product of aldol condensation and Cannizzaro reaction :
Phenyl acetal dehyde
Phenyl acetal dehyde
In the above reaction sequence, write the chemical formula and IUPAC name of X and Y.
Draw the tetrahedral intermediate formed by nucleophilic attack on carbonyl carbon in nucleophilic addition reaction.
Explain :
(a) Acetic acid is a weaker acid than formic acid.
(b) Carboxylic acids have higher boiling points than aldehydes of comparable molecular mass.
(a) Acetic acid is a weaker acid than formic acid.
(b) Carboxylic acids have higher boiling points than aldehydes of comparable molecular mass.
Although phenoxide ion has more number of resonating structures than carboxylate ion, carboxylic acid is a stronger acid than phenol. Why?
Give plausible explanation :
During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.
During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.
Write the equations of the following reactions:
(i) Friedel-Crafts acetylation of benzene.
(ii) Gattermann-Koch aldehyde synthesis.
(iii) Gattermann aldehyde synthesis.
(i) Friedel-Crafts acetylation of benzene.
(ii) Gattermann-Koch aldehyde synthesis.
(iii) Gattermann aldehyde synthesis.
Write structural formulas and names of four possible aldol condensation products from propanal and butanal in each case indicate which aldehyde acts as nucleophile and which as electrophile.
Describe the following :
Cross adol condensation
Cross adol condensation
Give simple chemical terts to distinguish between the pair of compound :
Propanal and Propanone
Propanal and Propanone
An organic compound with the molecular formula $C _9 H _{10} O$ forms 2,4-DNP derivative, reduces Tollens' reagent and undergoes Cannizzaro reaction. On vigorous oxidation it gives 1,2-benzene dicarboxylic acid. Identify the compound.
View full solution →An organic compound contains $69.77 \%$ carbon, $11.63 \%$ hydrogen and rest oxygen. The molecular mass of the compound is 86 . It does not reduce Tollens' reagents but forms an addition compound with sodium hydrogen sulphite and give positive iodoform test on vigorous oxidation it gives ethanoic and propanoic acid. Write the possible structure of the compound.
View full solution →(a) Why $\alpha$-hydrogen of carbonyl compound are acidic in nature?
(b) Explain aldol condensation reaction of ethanal.
View full solution →(b) Explain aldol condensation reaction of ethanal.
Describe the reactions of -COOH group present in carboxylic acids.
How are carboxylic acids prepared from the following compounds? Explain with examples:
(a) Primary alcohol
(b) Acyl halide
(c) Acid anhydride
(d) Grignard reagent
(e) Alkyl benzene.
(a) Primary alcohol
(b) Acyl halide
(c) Acid anhydride
(d) Grignard reagent
(e) Alkyl benzene.
Describe the reactions of carboxylic acids in which C-OH bond is broken.
An organic compound (A) [Molecular formula $\left.C _8 H _{10} O _2\right]$ was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and an alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but-1-ene.
Write equations for the reactions involved.
View full solution →Write equations for the reactions involved.
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