Question:
Consider the following compounds. Arrange these compounds in a n increasing order of reactivity with nitrating mixture. The correct order is :
Consider the following compounds. Arrange these compounds in a n increasing order of reactivity with nitrating mixture. The correct order is :
Show Hint
For phenol derivatives, Nitro groups (EWG) at ortho/para positions significantly increase acidity due to resonance stabilization of the negative charge.
Updated On: Feb 24, 2026
- $c<b<a$
- $b<c<a$
- $b<a<c$
- $c<a<b$
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Acidity is determined by the stability of the conjugate base. Electron-withdrawing groups (EWG) increase acidity by stabilizing the negative charge, while electron-donating groups (EDG) decrease acidity.
Step 2: Detailed Explanation:
Assuming the compounds are: (a) p-nitrophenol, (b) phenol, and (c) p-cresol:
- p-Nitrophenol (a): The $-NO_2$ group is a strong EWG ($-I$ and $-M$ effects), making it the most acidic.
- Phenol (b): Has no substituted groups.
- p-Cresol (c): The $-CH_3$ group is an EDG ($+I$ and hyperconjugation), which destabilizes the phenoxide ion, making it the least acidic.
Order: $p-cresol<phenol<p-nitrophenol$.
Step 3: Final Answer:
The correct order is $c<b<a$.
Acidity is determined by the stability of the conjugate base. Electron-withdrawing groups (EWG) increase acidity by stabilizing the negative charge, while electron-donating groups (EDG) decrease acidity.
Step 2: Detailed Explanation:
Assuming the compounds are: (a) p-nitrophenol, (b) phenol, and (c) p-cresol:
- p-Nitrophenol (a): The $-NO_2$ group is a strong EWG ($-I$ and $-M$ effects), making it the most acidic.
- Phenol (b): Has no substituted groups.
- p-Cresol (c): The $-CH_3$ group is an EDG ($+I$ and hyperconjugation), which destabilizes the phenoxide ion, making it the least acidic.
Order: $p-cresol<phenol<p-nitrophenol$.
Step 3: Final Answer:
The correct order is $c<b<a$.
Was this answer helpful?
0
1
Top Questions on Chemical Kinetics
- What is the effect of a catalyst on the activation energy and enthalpy of a reaction?
- WBBSE XII - 2026
- Chemistry
- Chemical Kinetics
- Derive the integrated rate equation for a first-order reaction.
- WBBSE XII - 2026
- Chemistry
- Chemical Kinetics
- An organic compound undergoes first order decomposition. The time taken for decomposition to \(\dfrac{1}{8}\) and \(\dfrac{1}{10}\) of its initial concentration are \(t_{1/8}\) and \(t_{1/10}\) respectively. Find the value of \[ \frac{t_{1/8}}{t_{1/10}}\times10 \] (Given: \(\log 2 = 0.3\))
- JEE Main - 2026
- Chemistry
- Chemical Kinetics
- At $27^\circ\text{C}$, in presence of a catalyst, activation energy of a reaction is lowered by $10\,\text{kJ mol}^{-1}$. The logarithm of the ratio $\dfrac{k(\text{catalysed})}{k(\text{uncatalysed})}$ is ___.
(Consider that the frequency factor for both the reactions is same)
- JEE Main - 2026
- Chemistry
- Chemical Kinetics
- Given below are statements about some molecules/ions. Identify the CORRECT statements.
A. The dipole moment value of $\mathrm{NF_3}$ is higher than that of $\mathrm{NH_3}$.
B. The dipole moment value of $\mathrm{BeH_2}$ is zero.
C. The bond order of $\mathrm{O_2^{2-}}$ and $\mathrm{F_2}$ is same.
D. The formal charge on the central oxygen atom of ozone is $-1$.
E. In $\mathrm{NO_2}$, all the three atoms satisfy the octet rule, hence it is very stable.
Choose the correct answer from the options given below:
- JEE Main - 2026
- Chemistry
- Chemical Kinetics
View More Questions
Questions Asked in JEE Main exam
- Three charges $+2q$, $+3q$ and $-4q$ are situated at $(0,-3a)$, $(2a,0)$ and $(-2a,0)$ respectively in the $x$-$y$ plane. The resultant dipole moment about origin is ___.
- JEE Main - 2026
- Electromagnetic waves
- Consider the following reactions.
\(PbCl_2 + K_2CrO_4 \rightarrow A + 2KCl\) (Hot solution)
\(A + NaOH \rightarrow B + Na_2CrO_4\)
\(PbSO_4 + 4CH_3COONH_4 \rightarrow (NH_4)_2SO_4 + X\)
In the above reactions, A, B and X are respectively:- JEE Main - 2026
- Hydrolysis of salts
- A bag contains 10 balls out of which \( k \) are red and \( (10-k) \) are black, where \( 0 \le k \le 10 \). If three balls are drawn at random without replacement and all of them are found to be black, then the probability that the bag contains 1 red and 9 black balls is:
- JEE Main - 2026
- Probability
- Given below are two statements:
Statement I: \( \mathrm{C<O<N<F} \) is the correct order in terms of first ionization enthalpy values.
Statement II: \( \mathrm{S>Se>Te>Po>O} \) is the correct order in terms of the magnitude of electron gain enthalpy values.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2026
- Periodic Trends In Properties Of Elements
- As compared with chlorocyclohexane, which of the following statements correctly apply to chlorobenzene?
The magnitude of negative charge is more on chlorine atom.
The C--Cl bond has partial double bond character.
C--Cl bond is less polar.
C--Cl bond is longer due to repulsion between delocalised electrons of the aromatic ring and lone pairs of electrons of chlorine.
The C--Cl bond is formed using \(sp^2\) hybridised orbital of carbon.
Choose the correct answer from the options given below:- JEE Main - 2026
- Alkenes
View More Questions