Statement-1: Methyl orange is a weak acid
Statement-2: Benzenoid form of methyl orange is deeply coloured than quinonoid form
Check out which of the above statement is true?
Statement-2: Benzenoid form of methyl orange is deeply coloured than quinonoid form
Check out which of the above statement is true?
Show Hint
Acid-base indicators like methyl orange change color due to structural transformations between their benzenoid and quinonoid forms. The quinonoid form is generally more deeply colored
- Statement-1 is correct and Statement-2 is wrong
- Both the Statements-1 and Statement-2 are correct
- Statement-1 is wrong and Statement-2 is correct
- None of them
The Correct Option is A
Solution and Explanation
Analysis of Statements on Methyl Orange:
Statement I:
Methyl orange is not a weak acid; it is an acid-base indicator that exists in different structural forms depending on the pH of the solution:
- In acidic solutions, methyl orange exists in its protonated form.
- In basic solutions, it undergoes deprotonation to form a conjugate base.
Conclusion: Since methyl orange is not classified as a weak acid, Statement I is incorrect.
Statement II:
The color intensity of methyl orange depends on its structural form:
- The quinonoid form of methyl orange is more intensely or deeply colored and is responsible for the orange/red coloration in acidic media.
- The benzenoid form is less intensely colored and contributes to the yellow coloration in basic media.
Since the statement incorrectly claims that the benzenoid form is more intensely colored, Statement II is also incorrect.
Final Conclusion:
Since both Statement I and Statement II are incorrect, the correct answer is option (1).
Top Questions on Amines
The descending order of basicity of following amines is :
Choose the correct answer from the options given below :- Matrix match: Match the items in the list with the appropriate compounds.
Matrix match- i) Non-reducing disaccharide → c) Sucrose
- ii) Reducing disaccharide → e) Maltose
- iii) Aldohexose → b) Glucose
- iv) Ketohexose → a) Fructose
- v) Polysaccharide → d) Lactose
Which of the following amine(s) show(s) positive carbamylamine test?
The correct order of basicity for the following molecules is:
Match the compounds given in List-I with the items given in List-II
Questions Asked in JEE Main exam
Match List-I with List-II.
Choose the correct answer from the options given below :- JEE Main - 2025
- Thermodynamics
- Let \( y = f(x) \) be the solution of the differential equation\[\frac{dy}{dx} + \frac{xy}{x^2 - 1} = \frac{x^6 + 4x}{\sqrt{1 - x^2}}, \quad -1 < x < 1\] such that \( f(0) = 0 \). If \[6 \int_{-1/2}^{1/2} f(x)dx = 2\pi - \alpha\] then \( \alpha^2 \) is equal to __________.
- JEE Main - 2025
- Differential equations
- Marks obtained by all the students of class 12 are presented in a frequency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and median class frequency 12. If the number of students whose marks are less than 12 is 18, then the total number of students is:
- JEE Main - 2025
- Statistics
- Let the system of equations $ x + 5y - z = 1 $ $ 4x + 3y - 3z = 7 $ $ 24x + y + \lambda z = \mu $ where $ \lambda, \mu \in \mathbb{R} $, have infinitely many solutions. Then the number of the solutions of this system, if $x, y, z$ are integers and satisfy $7 \leq x + y + z \leq 77$, is:
- JEE Main - 2025
- Linear Systems and Determinants
- A force of 49 N acts tangentially at the highest point of a sphere (solid of mass 20 kg) kept on a rough horizontal plane. If the sphere rolls without slipping, then the acceleration of the center of the sphere is:
- JEE Main - 2025
- Quantum Mechanics
Concepts Used:
Amines
Amine is a type of compound which is derived from ammonia (NH3). According to Organic chemistry, they are basically classified as the functional groups of the organic nitrogen compounds that contain nitrogen atoms with a lone pair.
Amine - Types
Primary Amines:
It is formed when one hydrogen atom in ammonia is substituted by an alkyl or aromatic group. Amino acids and methyl amine are the best examples that why aromatic amines include aniline.
Secondary Amines:
Amines that have two organic substitutes either alkyl or aryl ones or both and are bound to the nitrogen together with one hydrogen are termed as secondary amines. For Example, Dimethylamine.
Tertiary Amines:
Tertiary Amines are the amines where the nitrogen consists of three organic substitutes. For example, Trimethylamine and EDTA.