19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
3-hydroxy butanal is formed when X reacts with Y in dilute Z solution. What are X, Y and Z? X Y Z (a) CH3CHO, (CH3)2CO, NaOH (b) CH3CHO, CH3CHO, NaCl (c) (CH3)2CO, (CH3)2CO, HCl (d) CH3CHO, CH3CHO, NaOH
Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali
(a) (b) (c) (d)
In the scheme given below, the total number of intramolecular aldol condensation products formed from ′′푌′′ is (a)1 (b)2 (c)3 (d)4
Benzaldehyde + NaOH→
shows Cannizzaro’s reaction due to
(a) (b) (c) (d)
Undergo Cannizaro reaction give product as (a) (b) (c) (d)
The reaction given is
The compound 푥is
Assertion(A) 2-butenal lacks enolisable H-atom, α to carbonyl group, still it has sufficient acidic character. Reason(R) The conjugate base of 2-butenal is stabilized by resonance. (AIIMS 2009)
The compound, with which ethanal does not react, is. (AFMC 2009)
The most reactive of the following is (J&K CET)
If heavy water is taken as solvent instead of normal water while performing Cannizzaro reaction, the products of the reaction are (AIIMS 2009)
Aldehydes and ketones are differentiated by using (UP CPMT 2010)
In the following reaction sequence, C H NH Cl Ca(OH) Alc.KOH CH CHO X Y -> -> Y is (MHT CET 2010)
Ethyl methyl ketone is obtained by heating calcium salts of (MHT CET 2010)
Identify the reaction which is used to obtain -hydroxy ketone? (Guj CET 2010)
Which of the following reaction will not result in the formation of carbon-carbon bonds? (CBSE AIPMT 2010)
The reagent used in Gattermann Koch aldehyde synthesis is
Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), Propanal (II), Propanone (III), Butanone (IV)
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of a α-hydroxy acid. The carbonyl compound is
The increasing order of the rate of HCN addition to compounds A-D is
Nucleophilic addition reaction will be most favoured in
Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows