Comparison Between E1 and E2

Q. Arrange the reactivity of alcohols in decreasing order for $E_1$ elimination reaction.
1. $C{H}_3-\stackrel{HO}{\stackrel{|}{C}}H-C{H}_3$

2. $C{H}_3-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

3. $C_6{H}_5-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

4. $C{H}_3-C{H}_2-C{H}_{2}OH$

1. 
   3, 2, 4, 1
2. 
   2, 3, 4, 1
3. 
   2, 3, 1, 4
4. 
   3, 2, 1, 4

Q. Lucas test is used to differentiate and categorize primary, secondary and tertiary alcohols using a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is commonly referred to as “Lucas Reagent”.

2-Methyl-2-butonol can be differentiated from 3-methyl-2-butanol using Lucas reagent because:

1. 2-Methyl-2-butanol gives instant turbidity with Lucas reagent
2. 3-Methyl-2-butanol gives instant turbidity with Lucas reagent
3. 3-Methyl-2-butanol gives turbidity after 5-10 min with Lucas reagent
4. 2-Methyl-2-butanol gives turbidity after 5-10 min with Lucas reagent

Q. Among the following, which reaction of alcohol does not show cleavage of $R-O$ linkage:

1. $ROH+PC{l}_5$
2. $ROH+SOC{l}_2$
3. $ROH+HCl$
4. $ROH+Na$

Q. Arrange the reactivity of alcohols in decreasing order for $E_1$ elimination reaction.
1. $C{H}_3-\stackrel{HO}{\stackrel{|}{C}}H-C{H}_3$

2. $C{H}_3-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

3. $C_6{H}_5-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

4. $C{H}_3-C{H}_2-C{H}_{2}OH$

1. 
   3, 2, 4, 1
2. 
   2, 3, 4, 1
3. 
   2, 3, 1, 4
4. 
   3, 2, 1, 4

Q. The order of reactivity of following alcohols with halogen acids is:

1. I > II > III
2. III > II > I
3. II > I > III
4. I > III > II

Q. Among the following, which reaction of alcohol does not show cleavage of $R-O$ linkage:

1. $ROH+PC{l}_5$
2. $ROH+SOC{l}_2$
3. $ROH+HCl$
4. $ROH+Na$

Q. Write a note on elimination reaction.

Q. Neopentyl halide can undergo elimination reactions very easily.

1. True
2. False

Q. Which of the following reactions will yield $2,2$-dibromopropane?

1. $C{H}_3-C\equiv CH$ + 2HBr $⟶$
2. $CH\equiv CH$ + 2HBr$⟶$
3. $C{H}_{3}CH=CHBr$ + HBr $⟶$
4. $C{H}_3-CH=C{H}_2$ + HBr $⟶$

Q. Acetaldehyde cannot give:

1. Iodoform test
2. Lucas test
3. Fehling's test
4. Tollen's test

Q. Among the following, which reaction of alcohol does not show cleavage of $R-O$ linkage:

1. $ROH+PC{l}_5$
2. $ROH+SOC{l}_2$
3. $ROH+HCl$
4. $ROH+Na$

Q. Arrange the reactivity of alcohols in decreasing order for $E_1$ elimination reaction.
1. $C{H}_3-\stackrel{HO}{\stackrel{|}{C}}H-C{H}_3$

2. $C{H}_3-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

3. $C_6{H}_5-\stackrel{HO}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}H-C{H}_3$

4. $C{H}_3-C{H}_2-C{H}_{2}OH$

1. 
   3, 2, 4, 1
2. 
   2, 3, 4, 1
3. 
   2, 3, 1, 4
4. 
   3, 2, 1, 4