19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The increasing order of the rate of HCN addition to compounds A-D is
Identify compound X in the following sequences of reactions : (NEET 2021) (a) (b) (c) (d)
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
Consider the following statement Acetophenone can be prepared by (1) Oxidation of 1-phenyethanol (2) Reaction of 1-phenylethanol with methyl magnesiumbromide (3) Friedel Craft’s reaction of benzene with acetyl chlorid…
Acetone on distillation with conc. H2SO4 forms
The oxidation of toluene to benzaldehyde by chromyl chloride is called
Which one of the following can be oxidised to the corresponding carbonyl compound?
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)
An organic compound X on treatment with pyridinium chloro chromate in dichloromethane gives compound Y. Compound Y reacts with I2 and alkali to form triiodomethane. The compound ‘X’ is
Aldehydes are the first oxidation product of
Ketones where R = R1 = alkyl group. It can be obtained in one step by
Arrange the following compounds in decreasing order of their boiling points. CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3
Which of the following is the industrial method of preparation of acetaldehyde?
Complete the reaction: Ph −CH = CH −CHO PhMgBr/H3O+ → Product
A and B are respectively.