19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Consider the following groups (I) — OCOCH3 (II) — OCH3 (III) — OSO2CH3 (IV) — OSO2CF3 The decreasing order of their leaving ability is
Among these nucleophiles, which of the following orders is correct for their nucleophilicity order in gas phase? - CH , NH , OH ,F (a) - CH >NH >OH >F (b) F OH NH CH (c) - OH >NH >F >CH
Θ Θ Θ Θ C H , N H ,O H,F Among these nucleophiles, which of the following orders is correct for their nucleophilicity in acetone? (a) Θ Θ Θ Θ CH N H O H> F (b) F OH NH CH (c) Θ Θ Θ Θ O H> N H F CH
Θ Θ Θ F, ,Br, I Cl Among these nucleophiles, which of the following orders is correct for their nucleophilicity order in DMF? (a) Θ Θ Θ F> >Br>I Cl (b) Θ Θ Θ Θ I>Br> >F Cl (c) Θ Θ Θ Θ I>Br>F>Cl
Θ Θ Θ Θ F,Cl,Br,I Among these nucleophiles, which of the following orders is correct for their nucleophilicity order in water? (a) Θ Θ Θ Θ F>Cl >Br>I (b) Θ Θ Θ Θ I>Br>Cl>F (c) Θ Θ Θ Θ I>Br>F>Cl (d) none of t…
Light C H Cl C H Cl HCl -> is an example of
When the concentration of alkyl halide is tripled and concentration of OH is reduced to half, the rate of SN2 reaction increased by:
Formation of free radical takes place with absorption of minimum energy in the formation of : (a) (b) (c) (d)
The rate of SN1 reaction is fastest with: (a) (b) (c) CH Br CH NO2 Br (d)
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
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