QBManager

CHEMISTRY(KCET)

285607 $X \to_{(Reductive)}^{Ozonolysis} Y + Z$

Y can be obtained by Etard's reaction. Z undergoes disproportionation reaction with concentrated alkali. X could be
Ans:b
Exp:(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Explanation:

(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Karnataka CET 2014

CHEMISTRY(KCET)

285608 When ${CH}_{2} = CH - O - {CH}_{2} - {CH}_{3}$ reacts with one mole of HI , one of the products formed is

1 ethane

2 ethanol

3 iodoethene

4 ethanal.

Explanation:

(d)
$\begin{matrix} {CH}_{2} - CH - O - {CH}_{2} - {CH}_{3} \overset{HI}{\to} \\ {CH}_{2} = CH - OH + {CH}_{3} {CH}_{2} I \\ Vinyl alcohol \\ ‖ Tautomerisation \\ {CH}_{2} - CHO \\ Ethanal \end{matrix}$
Aldehydes, Ketones and Carboxylic Acids
C-87

Karnataka CET 2014

CHEMISTRY(KCET)

285609 Acetophenone cannot be prepared easily starting from

1

C_{6} H_{5} CH (OH) {CH}_{3}

2

C_{6} H_{5} {CH}_{3}

3

C_{6} H_{5} C \equiv CH

4

C_{6} H_{6}

Explanation:

(b) Acetophenone cannot be prepared easily from toluene, as $- {CH}_{3}$ group cannot be easily converted to $- {COCH}_{3}$ group.

Karnataka CET 2014

CHEMISTRY(KCET)

285605 Match the reactant in column-I with the reaction in column-II.

Column-I		Column-II
(i)	Acetic acid	(A)	Stephen's reaction
(ii)	Sodiumphenate	(B)	Friedel-Crafts reaction
(iii)	Methyl cyanide	(C)	HVZ reaction
(iv)	Toluene	(D)	Kolbe's reaction

1 i-C, ii-A, iii-D, iv-B

2 i-D, ii-B, iii-C, iv-A

3 i-B, ii-C, iii-A, iv-D

4 i-C, ii-D, iii-A, iv-B

Karnataka CET 2014

CHEMISTRY(KCET)

285607 $X \to_{(Reductive)}^{Ozonolysis} Y + Z$

Y can be obtained by Etard's reaction. Z undergoes disproportionation reaction with concentrated alkali. X could be
Ans:b
Exp:(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Explanation:

(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Karnataka CET 2014

CHEMISTRY(KCET)

285608 When ${CH}_{2} = CH - O - {CH}_{2} - {CH}_{3}$ reacts with one mole of HI , one of the products formed is

1 ethane

2 ethanol

3 iodoethene

4 ethanal.

Explanation:

(d)
$\begin{matrix} {CH}_{2} - CH - O - {CH}_{2} - {CH}_{3} \overset{HI}{\to} \\ {CH}_{2} = CH - OH + {CH}_{3} {CH}_{2} I \\ Vinyl alcohol \\ ‖ Tautomerisation \\ {CH}_{2} - CHO \\ Ethanal \end{matrix}$
Aldehydes, Ketones and Carboxylic Acids
C-87

Karnataka CET 2014

CHEMISTRY(KCET)

285609 Acetophenone cannot be prepared easily starting from

1

C_{6} H_{5} CH (OH) {CH}_{3}

2

C_{6} H_{5} {CH}_{3}

3

C_{6} H_{5} C \equiv CH

4

C_{6} H_{6}

Explanation:

(b) Acetophenone cannot be prepared easily from toluene, as $- {CH}_{3}$ group cannot be easily converted to $- {COCH}_{3}$ group.

Karnataka CET 2014

CHEMISTRY(KCET)

285605 Match the reactant in column-I with the reaction in column-II.

Column-I		Column-II
(i)	Acetic acid	(A)	Stephen's reaction
(ii)	Sodiumphenate	(B)	Friedel-Crafts reaction
(iii)	Methyl cyanide	(C)	HVZ reaction
(iv)	Toluene	(D)	Kolbe's reaction

1 i-C, ii-A, iii-D, iv-B

2 i-D, ii-B, iii-C, iv-A

3 i-B, ii-C, iii-A, iv-D

4 i-C, ii-D, iii-A, iv-B

Karnataka CET 2014

CHEMISTRY(KCET)

285607 $X \to_{(Reductive)}^{Ozonolysis} Y + Z$

Y can be obtained by Etard's reaction. Z undergoes disproportionation reaction with concentrated alkali. X could be
Ans:b
Exp:(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Explanation:

(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Karnataka CET 2014

CHEMISTRY(KCET)

285608 When ${CH}_{2} = CH - O - {CH}_{2} - {CH}_{3}$ reacts with one mole of HI , one of the products formed is

1 ethane

2 ethanol

3 iodoethene

4 ethanal.

Explanation:

(d)
$\begin{matrix} {CH}_{2} - CH - O - {CH}_{2} - {CH}_{3} \overset{HI}{\to} \\ {CH}_{2} = CH - OH + {CH}_{3} {CH}_{2} I \\ Vinyl alcohol \\ ‖ Tautomerisation \\ {CH}_{2} - CHO \\ Ethanal \end{matrix}$
Aldehydes, Ketones and Carboxylic Acids
C-87

Karnataka CET 2014

CHEMISTRY(KCET)

285609 Acetophenone cannot be prepared easily starting from

1

C_{6} H_{5} CH (OH) {CH}_{3}

2

C_{6} H_{5} {CH}_{3}

3

C_{6} H_{5} C \equiv CH

4

C_{6} H_{6}

Explanation:

(b) Acetophenone cannot be prepared easily from toluene, as $- {CH}_{3}$ group cannot be easily converted to $- {COCH}_{3}$ group.

Karnataka CET 2014

CHEMISTRY(KCET)

285605 Match the reactant in column-I with the reaction in column-II.

Column-I		Column-II
(i)	Acetic acid	(A)	Stephen's reaction
(ii)	Sodiumphenate	(B)	Friedel-Crafts reaction
(iii)	Methyl cyanide	(C)	HVZ reaction
(iv)	Toluene	(D)	Kolbe's reaction

1 i-C, ii-A, iii-D, iv-B

2 i-D, ii-B, iii-C, iv-A

3 i-B, ii-C, iii-A, iv-D

4 i-C, ii-D, iii-A, iv-B

Karnataka CET 2014

CHEMISTRY(KCET)

285607 $X \to_{(Reductive)}^{Ozonolysis} Y + Z$

Y can be obtained by Etard's reaction. Z undergoes disproportionation reaction with concentrated alkali. X could be
Ans:b
Exp:(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Explanation:

(b)
'Y' is obtained by Etard's reaction.
Toluene
(Benzaldehyde)
$\underset{Formaldehyde}{2 HCHO} + NaOH \to_{Cannizzaros's reaction}^{}$
Formaldehyde 'Z'
$HCOONa + {CH}_{3} OH$
Sodium formate

Karnataka CET 2014

CHEMISTRY(KCET)

285608 When ${CH}_{2} = CH - O - {CH}_{2} - {CH}_{3}$ reacts with one mole of HI , one of the products formed is

1 ethane

2 ethanol

3 iodoethene

4 ethanal.

Explanation:

(d)
$\begin{matrix} {CH}_{2} - CH - O - {CH}_{2} - {CH}_{3} \overset{HI}{\to} \\ {CH}_{2} = CH - OH + {CH}_{3} {CH}_{2} I \\ Vinyl alcohol \\ ‖ Tautomerisation \\ {CH}_{2} - CHO \\ Ethanal \end{matrix}$
Aldehydes, Ketones and Carboxylic Acids
C-87

Karnataka CET 2014

CHEMISTRY(KCET)

285609 Acetophenone cannot be prepared easily starting from

1

C_{6} H_{5} CH (OH) {CH}_{3}

2

C_{6} H_{5} {CH}_{3}

3

C_{6} H_{5} C \equiv CH

4

C_{6} H_{6}

Explanation:

(b) Acetophenone cannot be prepared easily from toluene, as $- {CH}_{3}$ group cannot be easily converted to $- {COCH}_{3}$ group.

Karnataka CET 2014

CHEMISTRY(KCET)

285605 Match the reactant in column-I with the reaction in column-II.

Column-I		Column-II
(i)	Acetic acid	(A)	Stephen's reaction
(ii)	Sodiumphenate	(B)	Friedel-Crafts reaction
(iii)	Methyl cyanide	(C)	HVZ reaction
(iv)	Toluene	(D)	Kolbe's reaction

1 i-C, ii-A, iii-D, iv-B

2 i-D, ii-B, iii-C, iv-A

3 i-B, ii-C, iii-A, iv-D

4 i-C, ii-D, iii-A, iv-B

Karnataka CET 2014