What Not to Do with Grignard Reagents

Q. Preparation of alcohol from grignard reagent

Q.

What is fermentation? How is Ethanol prepared by fermentation? Give any two uses of ethanol?

Q. In order to prepare flurobenzene from benzenediazonium chloride, which of the following reagents is used?

1. Fluorine
2. HF
3. Hydroflurosillic acid
4. Fluroboric acid

Q.

What is acid catalysed dehydration means?

Q. How are the following obtained :​

(c) Methylated spirit​

Q. The chlorination of toluene in the presence of light and heat followed by treatment with aqueous $NaOH$ gives:

1. o–Cresol
2. p–Cresol
3. 2, 4–Dihydroxy toluene
4. Benzyl alcohol

Q.

In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction [BIT 1992]

1. Diastase, maltase and zymase

2. Maltase, zymase and invertase

3. Diastase, zymase and lactase

4. Diastase, invertase and zymase

Q. Which of the following amines will give primary alcohol with $NaN{O}_2/Conc.HCl:$

$\left(a\right)C{H}_3-C{H}_2-\underset{C{H}_3}{\underset{|}{C}}-N{H}_2$

$\left(b\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}}-N{H}_2$

$\left(c\right)C{H}_3-\underset{C{H}_3}{\underset{|}{C}}-C{H}_2-C{H}_2-N{H}_2$
$\left(d\right)Allofthese$

1. c
2. a
3. d
4. b

Q.

Benzyl alcohol is obtained from benzaldehyde by [CPMT 1983; MNR 1993]

1. Fittig's reaction

2. Cannizaro's reaction

3. Wurtz's reaction

4. Kolbe's reaction

Q.

The fermentation of starch to give alcohol occurs mainly with the help of [CPMT 1971; MH CET 1999; RPMT 2000]

1. O₂

2. CO₂
   

3. Enzymes

4. Air

Q.

Name the enzymes and write the reactions involved in the preparation of ethanol from sucrose by fermentation.

Q.

Benzyl alcohol is obtained from benzaldehyde by [CPMT 1983; MNR 1993]

1. Fittig's reaction

2. Cannizaro's reaction

3. Kolbe's reaction

4. Wurtz's reaction

Q.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

[IIT-JEE 1990]

1. o-cresol

2. p-cresol

3. 2, 4-dihydroxy toluene

4. Benzyl alcohol

Q. Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives:-

1. o-cresol
2. 2, 4-dihydroxy toluene
3. p-cresol
4. Benzyl alcohol

Q.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

[IIT-JEE 1990]

1. Benzyl alcohol

2. p-cresol

3. o-cresol

4. 2, 4-dihydroxy toluene

Q.

Alcoholic fermentation is brought about by the action of [CPMT 1977, 79, 88; DPMT 1983]

1. Yeast

2. CO₂

3. O₂

4. Invertase

Q.

Which enzyme converts glucose and fructose both into ethanol

[MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]

1. Invertase

2. Zymase

3. Maltase

4. Diastase

Q. In the given reaction

$C{H}_3-\stackrel{O}{\stackrel{||}{C}}-O-\underset{C{H}_3}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}}-C{H}_3\stackrel{Na/C_2{H}_{5}OH}{\to }\left(X\right)+\left(Y\right)$

$\left[X\right]and\left[Y\right]$ respectively be:
$\left(a\right)C{H}_3-C{H}_2-OHandC{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}}-OH$
$\left(b\right)C{H}_3-C{H}_2-OHandC{H}_3-\underset{C{H}_3}{\underset{|}{C}}=C{H}_2$
$\left(c\right)C{H}_2=C{H}_{2}andC{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}}-OH$
(d) all the above

1. c
2. a
3. b
4. d

Q. Identify the reaction in which alcohol is formed by breakdown of sucrose in presence of an enzyme zymase.

1. Fermentation
2. Inversion
3. Esterification
4. Rearrangement

Q. Write the structure of the product when chlorobenzene is treated with methyl chloride in the presence of sodium metal and dry ether.

Q. Chlorination of Toluene in the presence of light and heat followed by treatment with aqueous sodium hydroxide gives

1. O-cresol
2. p-cresol
3. Benzyl Alcohol
4. 2, 4-Dihydroxy toluene

Q. In the given example B, C and B, D are :

1. Positional isomers
2. Functional isomers
3. Metamers
4. Chain isomers

Q. 5.0 ${cm}^3$ of $H_2{O}_2$ liberates 0.508 g if iodine from an acidified KI solution. The strength of $H_2{O}_2$ solution in term of volume strength at STP is?

1. 6.48 volumes
2. None of these
3. 7.68 volumes
4. 4.48 volumes

Q. The enzyme which converts glucose to ethyl alcohol is:

1. zymase
2. invertase
3. maltase
4. diastase

Q. What is the final product of above reaction?

1. $C{H}_3-\stackrel{C{H}_2}{\stackrel{||}{\underset{C{H}_3}{\underset{|}{C}}}}$
2. $C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-Br$
3. $C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-MgBr$
4. $C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}$

Q. The enzyme that converts glucose into ethyl alcohol and carbon dioxide is:

1. invertase
2. urease
3. maltase
4. zymase
5. diastase

Q.

1. $(C{H}_3-C{H}_2-C{H}_2{)}_3-C-OH$
2. $(C{H}_3-C{H}_2{)}_2-C(OH)-C{H}_3$
3. $C{H}_3-C{H}_2-C{H}_2-C{H}_2-C{H}_2-OH$
4. $(C{H}_3-C{H}_2{)}_2-CH-C{H}_{2}OH$

Q.

In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction [BIT 1992]

1. Diastase, maltase and zymase

2. Maltase, zymase and invertase

3. Diastase, zymase and lactase

4. Diastase, invertase and zymase

Q. Which of the following amines will give primary alcohol with $NaN{O}_2/Conc.HCl:$

$\left(a\right)C{H}_3-C{H}_2-\underset{C{H}_3}{\underset{|}{C}}-N{H}_2$

$\left(b\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}}-N{H}_2$

$\left(c\right)C{H}_3-\underset{C{H}_3}{\underset{|}{C}}-C{H}_2-C{H}_2-N{H}_2$
$\left(d\right)Allofthese$

1. $a$
2. $b$
3. $c$
4. $d$

Q.