The Cannizaro Reaction

Q.

Complete the following reaction:

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2+{\mathrm{CHCl}}_3+\mathrm{Alc}\mathrm{KOH}\to$

Q.

What happens when Formaldehyde reacts with concentrated Sodium hydroxide?

Q.

Which of the following does not contain a peroxy bond?

1. Na2O2

2. BaO2

3. MnO2

4. H2S2O8

Q. Lassaigne extract having $N{a}_{2}S$ when acidified with acetic acid and on addition of lead acetate produces a black precipitate of :

Q. Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is $C_8{H}_{8}O$. Q undergoes Cannizzaro reaction but not haloform reaction, whereas S undergoes haloform reaction but not Cannizzaro reaction.

(i) $P\underset{ii)Zn/H_{2}O}{\overset{i)O_3/C{H}_{2}C{l}_2}{\to }}\underset{\left(C_8{H}_{8}O\right)}{Q}$
(ii) $R\underset{ii)Zn/H_{2}O}{\overset{i)O_3/C{H}_{2}C{l}_2}{\to }}\underset{\left(C_8{H}_{8}O\right)}{S}$

The option(s) with suitable combination of P and R, respectively, is(are):

1. 
2. 
3. 
4. 

Q. In the Cannizzaro reaction given below:
$2Ph-CHO\stackrel{\stackrel{\ominus }{OH}}{\to }PH-C{H}_{2}OH+PhC{O}_2^{\ominus }$ the slowest step is:

1. The attack of $\stackrel{\ominus }{OH}$ at the carbonyl group
2. The transfer of hydride to the carbonyl group.
3. The abstraction of proton from the carboxylic acid.
4. The deprotonation of $Ph-C{H}_{2}OH.$

Q. How oxidation reaction involves in basic medium

Q. In the following sequence of reactions, products (B) to (E) are formed

1. Both proceed via $S{N}^2$ mechanism
2. Both proceed via E2 mechanism
3. B to C proceeds via $E^2$ and D to E via $S{N}^2$ mechanism
4. B to C proceeds via $S{N}^2$ and D to E via E2 mechanism

Q. reaction of mg with conc HNO_3 Mg + conc HNO_3 → ?

Q. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives:

1. Benzyl alcohol and sodium formate
2. Sodium benzoate and methyl alcohol
3. Sodium benzoate and sodium formate
4. Benzyl alcohol and methyl alcohol

Q.

how will we balance the equation

HNO2 + KMnO4 + H2SO4 = KMnO4 + HNO3 + H2O + K2SO4

Q. The difference between aldol condensation and Cannizzaro’s reaction is that:

1. the former takes place in the presence of α-H-atom
2. the former takes place in the absence of $\alpha -H-atom$
3. the former takes place in the presence of $\beta -H-atom$
4. none of the above