Stability of Carbocation

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

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

Q.

The order of stability of the following carbocations:

Q. Compare the carbon-carbon bond rotation across the compounds A, B and C:

1. $B>A>C$
2. $A>C>B$
3. $A>B>C$
4. $B>C>A$

Q. How many products will be aromatic ion when $AgN{O}_3$ reacts with the following compounds.

Q. The correct order of rates of solvolysis of the following compounds is:

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

Q. How many of the following compounds are stable after deprotonation?

Q. In the following carbocation, $H/C{H}_3$ that is most likely to migrate to the positively charged carbon is:

1. $C{H}_3$ at $C–4$
2. $H$ at $C–4$
3. $C{H}_3$ at $C–2$
4. $H$ at $C–2$

Q.

A solution of (-) - 1 - chloro - 1 - phenylethane in toluene racemises slowly in the presence of a small amount of $SbC{l}_5$, due to the formation of :

1. carbene

2. free radical

3. carbanion

4. carbocation

Q. Which of the following is the most stable ion?

1. $P{h}_3\stackrel{+}{C}$
2. $P{h}_2\stackrel{+}{C}H$
3. $C{H}_3\stackrel{+}{C}{H}_2$
4. $Ph\stackrel{+}{C}{H}_2$

Q. Which one of the following carbocation is the most stable?

1. 
2. 
3. 
4. 

Q. In which of the following compounds, the $C-Cl$ bond ionisation shall give most stable carbonium ion?

1. 
   
2. 
   
3. 
   
4. 

Q. Most stable carbonium ion among the following is :

1. $p-\left(N{O}_2\right)-C_6{H}_4-C{H}_2^{+}$
2. $C_6{H}_{5}C{H}_2^{+}$
3. $p-\left(Cl\right)-C_6{H}_4-C{H}_2^{+}$
4. $p-\left(C{H}_{3}O\right)-C_6{H}_4-C{H}_2^{+}$

Q. Identify the species having one $\pi$-bond and maximum number of canonical forms from the following :
(JEE (MAIN)-2021)

Q. Which of the following statement regarding the $S_{N}1$ reaction shown by alkyl halide is incorrect?

1. The added nucleophile plays no kinetic role in $S_{N}1$ reaction.
2. The $S_{N}1$ reaction on the chiral starting material ends up with racemisation of the product.
3. The $S_{N}1$ reaction involves the complete inversion of the configuration of the optically active substrate
4. The more stable the carbocation intermediate the faster the $S_{N}1$ reaction.

Q. Which one of the following species is most stable?

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

Q. can be obtained by:

1. 
2. 
3. 
4. 

Q. The compound(s) given below that are soluble in $NaHC{O}_3$ is/are:

1. (a), (b) and (e)
2. (c) and (d)
3. (a), (b), (c), (d) and (e)
4. (b), (c) and (d)

Q. Which of the following carbocation is least stable

1. $\stackrel{\oplus }{C}{H}_2-CH=CH=C{H}_2$

2. $(C{H}_2=CH{)}_2\stackrel{+}{C}H$

3. 

4. 

Q.

The following structure has five different types of C-H bonds, mark a to e



Arrange the five C-H bonds in decreasing order of their bond energy.

1. a>b>d>e>c
   

2. a>c>b>d=e
   

3. a>c>d>e>b
   

4. a>b>c>d>e

Q. Stability of alkyl carbocation can be explained by ?

1. Inductive effect
2. Hyperconjugation effect
3. Mesomeric effect
4. All of the above

Q. Which of the following species is most stable?

1. 
2. 
3. 
4. 

Q. Which of the following will give a white precipitate most readily when treated with $AgN{O}_3$ solution?

1. 
2. 
3. 
4. 

Q. Which of the following carbocation is most stable?

1. 
2. $(C_6{H}_5{)}_2\stackrel{+}{C}H$
3. $C_6{H}_5\stackrel{+}{C}{H}_2$
4. $(C_6{H}_5{)}_3\stackrel{+}{C}$

Q. In the following carbocation, $H/C{H}_3$ that is most likely to migrate to the positively charged carbon is:

1. $C{H}_3$ at $C–4$
2. $H$ at $C–4$
3. $C{H}_3$ at $C–2$
4. $H$ at $C–2$

Q. Which of the following double bonds in the given molecule is the most reactive towards a strong protic acid?

1. P
2. Q
3. R
4. S

Q.

In each of the following pairs of ions which ion is more stable?

1. I, I, I, I

2. I, I, II, II

3. II, II, I, I

4. II, II, II, II

Q. Which of the following is not found in alkenes?

1. Chain isomerism
2. Geometrical isomerism
3. Metamerism
4. Position isomerism

Q. Select the functional groups that can show metamerism.

1. $-O-$
2. $-S-$
3. $-\mathrm{NH}-$
4. $-\mathrm{CO}-$
5. $3°Amine$
6. $-\mathrm{COOH}$
7. $-\mathrm{OH}$
8. $-\mathrm{COX}$

Q. Sort the following free radicals according to their stability in increasing order.

1. $\mathrm{Methyl}\mathrm{Carbocation}$
2. $\mathrm{Primary}\mathrm{Carbocation}$
3. $\mathrm{Tertiary}\mathrm{Carbocation}$
4. $\mathrm{Secondary}\mathrm{Carbocation}$

Q.

Arrange the following carbocations in decreasing order of stability

1. IV > III > I > V > II
2. IV > I > III > II > V
3. V > IV > I > III > II

4. V > IV > III > I > II