List of top Chemistry Questions on Chemical Reactions of Aldehydes Ketones and Carboxylic Acids

Assertion (A) : All aliphatic aldehydes give a positive Fehling’s test.
Reason (R) : Aliphatic aldehydes are reduced by Fehling’s reagent.

Which of the reactions is used in the conversion of a ketone into hydrocarbon ?

Arrange the following compounds in increasing order of their reactivity towards HCN : \[ (CH_3)_3C-CO-CH_3,\qquad CH_3COCH_3,\qquad CH_3CHO \]

Answer the following: \[ (a)(i)\;\text{Write the product(s) when:} \] \[ (I)\;\text{One mol of ethanal is treated with }1\text{ mol of }CH_3OH\text{ in the presence of dry }HCl\text{ gas.} \] \[ (II)\;\text{Benzaldehyde is treated with conc. }NaOH. \] \[ (III)\;\text{Ethanoic acid is heated in the presence of }P_2O_5. \] \[ (a)(ii)\;\text{Write a simple chemical test to distinguish between ethanal and propanal.} \] \[ (a)(iii)\;\text{Write the name of the reagent to transform allyl alcohol to propenal.} \]

निम्नलिखित अभिक्रिया क्रम के लिए, सही विकल्प चुनिए :

वह यौगिक जो नीचे दिखाई गई ऐल्डोल संघनन अभिक्रिया से प्राप्त सही उत्पाद दे सकता है, वह है :

निम्नलिखित अभिक्रिया पर विचार कीजिए, और सही विकल्प चुनिए :

For the following reaction sequence, choose the correct option

What is the final product X in the following reaction? \[ \mathrm{CH_3CH_2CH_2CHO} \xrightarrow[(2)\ H_3O^+]{(1)\ \text{Ammoniacal AgNO}_3} X \]

Benzonitrile (A) + X \(\rightarrow\) B; A + Y \(\rightarrow\) C. B + C \(\xrightarrow{dil.\ NaOH}\) \(\alpha,\beta\)-unsaturated carbonyl compound. What are X and Y?

Considering LiBH\(_4\) reduces an ester group to the corresponding alcohol and does not reduce a carboxylic acid group, the correct statement about the major products \(P\), \(Q\), \(R\) and \(S\) is

Which of the following carbonyl compounds will undergo a self-oxidation and self-reduction reaction (Cannizzaro Reaction) when treated with a concentrated solution of a strong base (\( \text{NaOH} \))?

Compound \(P\) gives a red-orange precipitate with 2,4-DNP reagent and does not reduce Fehling's reagent. On drastic oxidation with chromic acid, \(P\) gives an aromatic product \(Q\) which produces effervescence on treating with aqueous \(\ce{NaHCO3}\). Compounds \(P\) and \(Q\), respectively, are:

Which is not a product of oxidation of citral with KMnO4 and CrO3?

Which compound does not show an iodoform test?

Why does an old sample of benzaldehyde turn blue litmus red?

Methyl propanoate on hydrolysis with dilute NaOH forms a salt that on further acidification with conc. HCl forms

Identify the product formed in the following reaction:
$C_6H_5 - CH_2 - CH_3 \xrightarrow[\text{ii) } H_3O^+]{\text{i) alk. } KMnO_4} \text{Product}$

Which of the following is used as reagent in Etard reaction?

Which of the following does NOT exhibit haloform reaction?

Identify the products of following reaction: Formaldehyde + Benzaldehyde $\xrightarrow{i. \text{conc. NaOH } ii. \text{H}_3\text{O}^+}$ Products.

Identify the product formed in the following reaction: $CH_{3}CH_{2}MgBr \xrightarrow[ii)~dil.~HCl]{i)~Dry~ice/dry~ether} Product$

Identify the product formed when Hex-3-enenitrile is reduced with diisobutylaluminium hydride followed by acid hydrolysis?

Identify the product obtained when alkyl alkanoate is hydrolysed with dilute $\text{HCl}$.

In the following reactions, find the product A and B