Alcohols as Nucleophiles and Electrophiles

Q.

Ethanol when reacted with PCl₅ gives A, POCl₃ and HCl. A reacts with silver nitrite to form B and AgCl . A and B respectively are

1. C₂H₅Cl and C₂H₅OC₂H₅

2. C₂H₆ and C₂H₅OC₂H₅

3. C₂H₅Cl and C₂H₅NO₂

4. C₂H₆ and C₂H₅NO₂

Q.

Reaction of ROH with R'MgX produce:

1. RH

2. R'H

3. R-R

4. R'-R'

Q. Which one of the following alcohols is most reactive for $S_{N}1$ reaction?

$\left(a\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(b\right)C_6{H}_5-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C_6{H}_5$
$\left(c\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(d\right)C{H}_3-\stackrel{OH}{\stackrel{|}{C}}-C{H}_3$

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

Q. Which one of the following alcohols is most reactive for $S_{N}1$ reaction?

$\left(a\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(b\right)C_6{H}_5-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C_6{H}_5$
$\left(c\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(d\right)C{H}_3-\stackrel{OH}{\stackrel{|}{C}}-C{H}_3$

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

Q.

Ethanol when reacted with PCl₅ gives A, POCl₃ and HCl. A reacts with silver nitrite to form B and AgCl . A and B respectively are

1. C₂H₅Cl and C₂H₅OC₂H₅

2. C₂H₆ and C₂H₅OC₂H₅

3. C₂H₅Cl and C₂H₅NO₂

4. C₂H₆ and C₂H₅NO₂

Q. Amongst the following, HBr reacts fastest with

1. Propan-1-ol
2. Propan-2-ol
3. 2-methylpropan-1-ol
4. 2-methylpropan-2-ol

Q.

Consider thiol anion RS^- and alkoxy anion RO^- .Which of the following statements is correct?

1. RS^- is less basic but more nucleophilic than RO^-

2. RS- is more basic and more nucleophilic than RO-

3. RS^- is more basic and less nucleophilic than RO^-

4. RS- is less basic but less nucleophilic than RO-

Q.

2- bromo butane $\stackrel{15\%aqsolnofEtOH}{\to }P$
In this reaction 70% recemisation takesplace % of inverted product would be:

1. 30

2. 70

3. 35

4. 65

Q.

2- bromo butane $\stackrel{15\%aqsolnofEtOH}{\to }P$
In this reaction 70% recemisation takesplace % of inverted product would be:

1. 30

2. 70

3. 35

4. 65

Q. Which one of the following alcohols is most reactive for $S_{N}1$ reaction?

$\left(a\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(b\right)C_6{H}_5-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C_6{H}_5$
$\left(c\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(d\right)C{H}_3-\stackrel{OH}{\stackrel{|}{C}}-C{H}_3$

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