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ALCOHOLS, PHENOLS AND ETHER

15055 Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $N a O H$ gives

1

o -

cresol

2

p

-cresol

3

2, 4 -

dihydroxy toluene

4 Benzyl alcohol

ALCOHOLS, PHENOLS AND ETHER

15095 Formation of diethyl ether from ethanol is based on a

1 Dehydration reaction

2 Dehydrogenation reaction

3 Hydrogenation reaction

4 Heterolytic fission reaction

ALCOHOLS, PHENOLS AND ETHER

15056 In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction

1 Diastase, maltase and zymase

2 Maltase, zymase and invertase

3 Diastase, zymase and lactase

4 Diastase, invertase and zymase

Explanation:

(a) $\underset{Starch}{2 {(C_{6} H_{10} O_{5})}_{n}} + n H_{2} O \underset{(from germinated barley)}{\overset{Diastase}{\to}} \underset{Maltose}{n (C_{12} H_{22} O_{11})}$
$C_{12} H_{22} O_{11} + H_{2} O \underset{(from yeast)}{\overset{Maltase}{\to}} 2 \underset{Glucose}{C_{6} H_{12} O_{6}}$
$C_{6} H_{12} O_{6} \underset{(from yeast)}{\overset{Zymase}{\to}} 2 C_{2} H_{5} O H + 2 C O_{2}$

ALCOHOLS, PHENOLS AND ETHER

15057 Primary alcohols can be obtained from the reaction of the $R M g X$ with

1

C O_{2}

2

H C H O

3

C H_{3} C H O

4

H_{2} O

Explanation:

For $H C H O$ ,
$R M g X + H C H O \to R C H_{2} O H$
For $C H_{3} C H O$
$R M g X + C H_{3} C H O \to R (C H_{3}) C H O H$
For $H_{2} O$
$R M g B r + H_{2} O ⟶ R H + M g (O H) B r$
For $C O_{2}$
$R M g B r + C O_{2} \to R C O O H$
All reactions are followed by hydrolysis to give respective compounds. Only for $H C H O$ , primary alcohol is produced.

ALCOHOLS, PHENOLS AND ETHER

15055 Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $N a O H$ gives

1

o -

cresol

2

p

-cresol

3

2, 4 -

dihydroxy toluene

4 Benzyl alcohol

ALCOHOLS, PHENOLS AND ETHER

15095 Formation of diethyl ether from ethanol is based on a

1 Dehydration reaction

2 Dehydrogenation reaction

3 Hydrogenation reaction

4 Heterolytic fission reaction

ALCOHOLS, PHENOLS AND ETHER

15056 In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction

1 Diastase, maltase and zymase

2 Maltase, zymase and invertase

3 Diastase, zymase and lactase

4 Diastase, invertase and zymase

Explanation:

(a) $\underset{Starch}{2 {(C_{6} H_{10} O_{5})}_{n}} + n H_{2} O \underset{(from germinated barley)}{\overset{Diastase}{\to}} \underset{Maltose}{n (C_{12} H_{22} O_{11})}$
$C_{12} H_{22} O_{11} + H_{2} O \underset{(from yeast)}{\overset{Maltase}{\to}} 2 \underset{Glucose}{C_{6} H_{12} O_{6}}$
$C_{6} H_{12} O_{6} \underset{(from yeast)}{\overset{Zymase}{\to}} 2 C_{2} H_{5} O H + 2 C O_{2}$

ALCOHOLS, PHENOLS AND ETHER

15057 Primary alcohols can be obtained from the reaction of the $R M g X$ with

1

C O_{2}

2

H C H O

3

C H_{3} C H O

4

H_{2} O

Explanation:

For $H C H O$ ,
$R M g X + H C H O \to R C H_{2} O H$
For $C H_{3} C H O$
$R M g X + C H_{3} C H O \to R (C H_{3}) C H O H$
For $H_{2} O$
$R M g B r + H_{2} O ⟶ R H + M g (O H) B r$
For $C O_{2}$
$R M g B r + C O_{2} \to R C O O H$
All reactions are followed by hydrolysis to give respective compounds. Only for $H C H O$ , primary alcohol is produced.

ALCOHOLS, PHENOLS AND ETHER

15055 Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $N a O H$ gives

1

o -

cresol

2

p

-cresol

3

2, 4 -

dihydroxy toluene

4 Benzyl alcohol

ALCOHOLS, PHENOLS AND ETHER

15095 Formation of diethyl ether from ethanol is based on a

1 Dehydration reaction

2 Dehydrogenation reaction

3 Hydrogenation reaction

4 Heterolytic fission reaction

ALCOHOLS, PHENOLS AND ETHER

15056 In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction

1 Diastase, maltase and zymase

2 Maltase, zymase and invertase

3 Diastase, zymase and lactase

4 Diastase, invertase and zymase

Explanation:

(a) $\underset{Starch}{2 {(C_{6} H_{10} O_{5})}_{n}} + n H_{2} O \underset{(from germinated barley)}{\overset{Diastase}{\to}} \underset{Maltose}{n (C_{12} H_{22} O_{11})}$
$C_{12} H_{22} O_{11} + H_{2} O \underset{(from yeast)}{\overset{Maltase}{\to}} 2 \underset{Glucose}{C_{6} H_{12} O_{6}}$
$C_{6} H_{12} O_{6} \underset{(from yeast)}{\overset{Zymase}{\to}} 2 C_{2} H_{5} O H + 2 C O_{2}$

ALCOHOLS, PHENOLS AND ETHER

15057 Primary alcohols can be obtained from the reaction of the $R M g X$ with

1

C O_{2}

2

H C H O

3

C H_{3} C H O

4

H_{2} O

Explanation:

For $H C H O$ ,
$R M g X + H C H O \to R C H_{2} O H$
For $C H_{3} C H O$
$R M g X + C H_{3} C H O \to R (C H_{3}) C H O H$
For $H_{2} O$
$R M g B r + H_{2} O ⟶ R H + M g (O H) B r$
For $C O_{2}$
$R M g B r + C O_{2} \to R C O O H$
All reactions are followed by hydrolysis to give respective compounds. Only for $H C H O$ , primary alcohol is produced.

ALCOHOLS, PHENOLS AND ETHER

15055 Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $N a O H$ gives

1

o -

cresol

2

p

-cresol

3

2, 4 -

dihydroxy toluene

4 Benzyl alcohol

ALCOHOLS, PHENOLS AND ETHER

15095 Formation of diethyl ether from ethanol is based on a

1 Dehydration reaction

2 Dehydrogenation reaction

3 Hydrogenation reaction

4 Heterolytic fission reaction

ALCOHOLS, PHENOLS AND ETHER

15056 In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction

1 Diastase, maltase and zymase

2 Maltase, zymase and invertase

3 Diastase, zymase and lactase

4 Diastase, invertase and zymase

Explanation:

(a) $\underset{Starch}{2 {(C_{6} H_{10} O_{5})}_{n}} + n H_{2} O \underset{(from germinated barley)}{\overset{Diastase}{\to}} \underset{Maltose}{n (C_{12} H_{22} O_{11})}$
$C_{12} H_{22} O_{11} + H_{2} O \underset{(from yeast)}{\overset{Maltase}{\to}} 2 \underset{Glucose}{C_{6} H_{12} O_{6}}$
$C_{6} H_{12} O_{6} \underset{(from yeast)}{\overset{Zymase}{\to}} 2 C_{2} H_{5} O H + 2 C O_{2}$

ALCOHOLS, PHENOLS AND ETHER

15057 Primary alcohols can be obtained from the reaction of the $R M g X$ with

1

C O_{2}

2

H C H O

3

C H_{3} C H O

4

H_{2} O

Explanation:

For $H C H O$ ,
$R M g X + H C H O \to R C H_{2} O H$
For $C H_{3} C H O$
$R M g X + C H_{3} C H O \to R (C H_{3}) C H O H$
For $H_{2} O$
$R M g B r + H_{2} O ⟶ R H + M g (O H) B r$
For $C O_{2}$
$R M g B r + C O_{2} \to R C O O H$
All reactions are followed by hydrolysis to give respective compounds. Only for $H C H O$ , primary alcohol is produced.

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