19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Methyl ethyl ketone is prepared by the oxidation of
The oxidation product of 2-propanol with hot conc. HNO3 is
Oxidation reactions can be carried out with chromic acid in aqueous acetone at 5–10°C.Which of following is incorrect in this respect (a) (b)
What reagent is used in the Rosenmund reduction?
Reduction of acetonitrile in presence of SnCl2/HCl, followed by hydrolysis gives :
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
Which of the aldehyde is most reactive towards nucleophilic addition reaction ?
Product may be
Which of the following carbonyl oxygen will form strongest hydrogen bond with 퐻2푂 molecule? (a) (b) (c) (d)
Correct order of reactivity of CH3CHO, C2H5COCH3 and CH3COCH3 is
The most reactive compound towards formation of cyanohydrin on treatment with HCN followed by acidification is
A and B in the following reactions are (a) (b) (c)
Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows
Which one of the following does not form sodium bisulphite addition product with sodium bisulphite solution
Benzaldehyde condenses with N,N-dimethylaniline in presence of anhydrous ZnCl2 to give
Which of the following species is the conjugate acid of the hemiacetal formed by reaction of benzaldehyde with methanol containing a trace of acid ? (a) (b) (c) (d)
Grignard reagent on reaction with acetone forms
Product in following reaction is CH3MgI + HCHO → Product
Identify the reactant X and the product Y
The order of reactivity of phenyl magnesium bromide with the following compounds is
Which of the following reagents converts both acetaldehyde and acetone to alkanes?