+I Effect

Q. Among the following four compounds
$\left(i\right)$ Phenol
$\left(ii\right)$ methyl phenol
$\left(iii\right)$ meta-nitrophenol
$\left(iv\right)$ para-nitrophenol
The acidity order is:

1. $\left(iv\right)>\left(iii\right)>\left(i\right)>\left(ii\right)$
2. $\left(iii\right)>\left(iv\right)>\left(i\right)>\left(ii\right)$
3. $\left(i\right)>\left(iv\right)>\left(iii\right)>\left(ii\right)$
4. $\left(ii\right)>\left(i\right)>\left(iii\right)>\left(iv\right)$

Q. The increasing order of the $p{K}_a$ values of the following compounds is :

1. $D<A<C<B$
2. $B<C<D<A$
3. $C<B<A<D$
4. $B<C<A<D$

Q.

The correct order of stability of the following carbanions is:

$(C{H}_3{)}_3{C}^{-}{,}^{-}CC{l}_3,(C{H}_3{)}_{2}C{H}^{-},C_6{H}_5-C{H}_2^{-}$

1. $C_6{H}_5-C{H}_2^{-}{>}^{-}CC{l}_3>(C{H}_3{)}_{2}C{H}^{-}>(C{H}_3{)}_3{C}^{-}$

2. None of the above

3. ${}^{-}CC{l}_3>C_6{H}_5-C{H}_2^{-}>(C{H}_3{)}_{2}C{H}^{-}>(C{H}_3{)}_3{C}^{-}$

4. $C_6{H}_5-C{H}_2^{-}{>}^{-}CC{l}_3>(C{H}_3{)}_3{C}^{-}>(C{H}_3{)}_{2}C{H}^{-}$

Q. Which of the following is the correct order of basic strength of amines in gaseous phase -

1. $(C{H}_3{)}_{3}N$ > $(C{H}_3{)}_{2}NH$ > $C{H}_{3}N{H}_2$
2. $(C{H}_3{)}_{3}N$ > $C{H}_{3}N{H}_2$ > $(C{H}_3{)}_{2}NH$
3. $(C{H}_3{)}_{2}NH$ > $C{H}_{3}N{H}_2$ > $(C{H}_3{)}_{3}N$
4. $(C{H}_3{)}_{2}NH$ > $(C{H}_3{)}_{3}N$ > $\left(C{H}_3\right)N{H}_2$

Q. Which of the following is the correct order of stability for the given carbocations?

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

Q.

Which one is most reactive towards nucleophilic addition reaction?

1. 

2. 

3. 

4. 

Q.

Alkyl group are o, p - directing because of

1. Inductive effect

2. Electromeric effect

3. Hyperconjugation effect

4. All the three

Q.

Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?

Q.

Species in which hyperconjugation does not occur is

1. ${\mathrm{CH}}_3\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

2. ${\left({\mathrm{CH}}_3\right)}_2\stackrel{+}{\mathrm{C}}\mathrm{H}$

3. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2$

4. $({\mathrm{CH}}_3{)}_3\mathrm{C}-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

Q. Arrange the following labelled hydrogens in decreasing order of acidity:

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

Q.

Arrange in the order of increasing acidic strengths.

1. X > Z > Y

2. Z < X > Y

3. X > Y > Z

4. Z > X > Y

Q. Which of the following acid has the highest $K_a$ value?

1. 
2. 
3. 
4. 

Q. Choose the correct statement(s) regarding acidic order:

1. Phenol is more acidic than benzoic acid
2. 4-Chlorophenol is more acidic than phenol
3. 4-methylbenzoic acid is less acidic than benzoic acid
4. Phenol is less acidic than benzoic acid

Q. Among the following, the strongest base is

1. $m-N{O}_2-C_6{H}_{4}N{H}_2$
2. $C_6{H}_{5}N{H}_2$
3. $p-N{O}_2-C_6{H}_{4}N{H}_2$
4. $C_6{H}_{5}C{H}_{2}N{H}_2$

Q. Compare the enol content of the given molecules and arrange them in decreasing order.

1. (I) > (II) > (III) > (IV)
2. (IV) > (III) > (II) > (I)
3. (III) > (IV) > (II) > (I)
4. (I) > (II) > (IV) > (III)

Q. Addition of $NaHS{O}_3$ to carbonyl comounds is an example of :

1. Nucleophilic addition
2. Nucleophilic substitution
3. Electrophilic substitution
4. Electrophilic addition

Q. The correct order of increasing $+I$ effect is :

1. $-C{H}_3<-H<-D<-T$
2. $-C{H}_3<-H<-T<-D$
3. $-H<-C{H}_3<-T<-D$
4. $-H<-D<-T<-C{H}_3$

Q.

Which one of the following orders is correct regarding the inductive effect of the substituents?

1. -NR₂<-OR>-F

2. -NR₂>-OR>-F

3. -NR₂<-OR<-F

4. -NR₂>-OR<-F

Q. Which of the following group shows maximum $+I$ effect?

1. $-C{H}_2^{-}$
2. $-O^{-}$
3. All the three groups show similar $+I$ effect.
4. $-N{H}^{-}$

Q. Consider the following reaction,
Major product $P$ is
[0.77 Mark]

1. 
2. 
3. 
4. 

Q. Which of the following group has highest positive inductive effect

1. 
2. 
3. 
4. 

Q. Arrange the following in increasing order of $+I$ effect :
$1^{\circ }\text{Alkyl Group,}{2}^{\circ }\text{Alkyl Group,}{3}^{\circ }\text{Alkyl Group}\text{and Methyl Group}$

1. $1^{\circ }\text{Alkyl Group}<2^{\circ }\text{Alkyl Group}<3^{\circ }\text{Alkyl Group}<\text{Methyl Group}$
2. $\text{Methyl Group}<1^{\circ }\text{Alkyl Group}<2^{\circ }\text{Alkyl Group}<3^{\circ }\text{Alkyl Group}$
3. $1^{\circ }\text{Alkyl Group}<3^{\circ }\text{Alkyl Group}<2^{\circ }\text{Alkyl Group}<\text{Methyl Group}$
4. $\text{Methyl Group}<3^{\circ }\text{Alkyl Group}<1^{\circ }\text{Alkyl Group}<1^{\circ }\text{Alkyl Group}$

Q. Arrange the following compounds in the increasing order of their acidic strength.
i. m-nitrophenol ii. m-cresol
iii. phenol .iv m-chlorophenol

1. iii < ii < i < iv
2. ii < iv < iii < i
3. ii < iii < iv < i
4. ii < iii < i < iv

Q. Compare the acidic strength of the following acids:

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

Q.

Which of the following will be most acidic?

1. $C{H}_3-COOH$

2. $C{H}_3-C{H}_2-COOH$

3. $C{H}_3-C{H}_2-C{H}_2-COOH$

4. $C{H}_3-C{H}_2-C{H}_2-C{H}_2-COOH$

Q. Which of the following is not an example of $+I$ group?

1. $-CN$
2. $-N{H}^{-}$
3. $-C{H}_2^{-}$
4. $-C{H}_3$

Q.

What is meant by the term average bond enthalpy? Why is there difference in bond enthalpy of $O-H$ bond in ethanol $\left(C_2{H}_{5}OH\right)$ and water?

Q. Which one of the following is correct ?
I. $C{H}_3-C{H}_2-C{D}_2^{+}$
II. $C{H}_3-C{H}_2-C{T}_2^{+}$
(Explain on the basis of inductive effect)

1. I is more stable than II
2. II is more stable than I
3. Both are equally stable
4. Stability criterion cannot be applied in this case

Q. Which of the following is an example of an electron donating group?

1. $-C{H}_3$
2. $-C{H}_2-C{H}_3$
3. $-C(C{H}_3{)}_3$
4. All of the above.

Q. 48 when C6H5Cl + KNH2 in presence of liq. NH3 reacted what will be the product?