19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The order of reactivity of phenyl magnesium bromide with the following compounds is
Identify the reactant X and the product Y
Product in following reaction is CH3MgI + HCHO → Product
Grignard reagent on reaction with acetone forms
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)
Benzaldehyde condenses with N,N-dimethylaniline in presence of anhydrous ZnCl2 to give
Which one of the following does not form sodium bisulphite addition product with sodium bisulphite solution
Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows
A and B in the following reactions are (a) (b) (c)
The most reactive compound towards formation of cyanohydrin on treatment with HCN followed by acidification is
Correct order of reactivity of CH3CHO, C2H5COCH3 and CH3COCH3 is
Which of the following carbonyl oxygen will form strongest hydrogen bond with 퐻2푂 molecule? (a) (b) (c) (d)
Product may be
Which of the aldehyde is most reactive towards nucleophilic addition reaction ?
Nucleophilic addition reaction will be most favoured in
The increasing order of the rate of HCN addition to compounds A-D is
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
Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), Propanal (II), Propanone (III), Butanone (IV)
The reagent used in Gattermann Koch aldehyde synthesis is
Reduction of acetonitrile in presence of SnCl2/HCl, followed by hydrolysis gives :
What reagent is used in the Rosenmund reduction?
Catalyst used in Rosenmund reduction is
In the following reaction, product P is
On heating calcium acetate and calcium formate, the product formed is
Dry heating of calcium acetate gives