Question:
Which of the following does not show disproportionation reaction?
Which of the following does not show disproportionation reaction?
Show Hint
An element can undergo disproportionation only when it is in an intermediate oxidation state. Species containing the element in its highest or lowest oxidation state generally do not show disproportionation.
Updated On: Jun 26, 2026
- \(ClO_2^{-}\)
- \(ClO_3^{-}\)
- \(ClO_4^{-}\)
- \(ClO^{-}\)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understand disproportionation reaction.
A disproportionation reaction is a redox reaction in which the same species undergoes both oxidation and reduction simultaneously.
For disproportionation to occur, the element must be in an intermediate oxidation state so that it can be oxidized to a higher oxidation state and reduced to a lower oxidation state.
Step 2: Calculate the oxidation state of chlorine in each species.
For \(ClO^{-}\), \[ x-2=-1 \] \[ x=+1 \] For \(ClO_2^{-}\), \[ x+2(-2)=-1 \] \[ x=+3 \] For \(ClO_3^{-}\), \[ x+3(-2)=-1 \] \[ x=+5 \] For \(ClO_4^{-}\), \[ x+4(-2)=-1 \] \[ x=+7 \]
Step 3: Analyze the possibility of disproportionation.
The oxidation state \(+7\) is the highest possible oxidation state of chlorine.
Therefore, chlorine in \(ClO_4^{-}\) cannot be oxidized further.
Since disproportionation requires simultaneous oxidation and reduction, \(ClO_4^{-}\) cannot undergo disproportionation.
On the other hand, \[ ClO^{-} \; (+1), \quad ClO_2^{-} \; (+3), \quad ClO_3^{-} \; (+5) \] are intermediate oxidation states and can undergo disproportionation reactions.
For example, \[ 3ClO^{-}\rightarrow 2Cl^{-}+ClO_3^{-} \] is a disproportionation reaction.
Step 4: Final conclusion.
Since chlorine is already in its maximum oxidation state \((+7)\) in perchlorate ion, \[ \boxed{ClO_4^{-}} \] does not show disproportionation reaction.
Hence, the correct option is \[ \boxed{(3)} \]
A disproportionation reaction is a redox reaction in which the same species undergoes both oxidation and reduction simultaneously.
For disproportionation to occur, the element must be in an intermediate oxidation state so that it can be oxidized to a higher oxidation state and reduced to a lower oxidation state.
Step 2: Calculate the oxidation state of chlorine in each species.
For \(ClO^{-}\), \[ x-2=-1 \] \[ x=+1 \] For \(ClO_2^{-}\), \[ x+2(-2)=-1 \] \[ x=+3 \] For \(ClO_3^{-}\), \[ x+3(-2)=-1 \] \[ x=+5 \] For \(ClO_4^{-}\), \[ x+4(-2)=-1 \] \[ x=+7 \]
Step 3: Analyze the possibility of disproportionation.
The oxidation state \(+7\) is the highest possible oxidation state of chlorine.
Therefore, chlorine in \(ClO_4^{-}\) cannot be oxidized further.
Since disproportionation requires simultaneous oxidation and reduction, \(ClO_4^{-}\) cannot undergo disproportionation.
On the other hand, \[ ClO^{-} \; (+1), \quad ClO_2^{-} \; (+3), \quad ClO_3^{-} \; (+5) \] are intermediate oxidation states and can undergo disproportionation reactions.
For example, \[ 3ClO^{-}\rightarrow 2Cl^{-}+ClO_3^{-} \] is a disproportionation reaction.
Step 4: Final conclusion.
Since chlorine is already in its maximum oxidation state \((+7)\) in perchlorate ion, \[ \boxed{ClO_4^{-}} \] does not show disproportionation reaction.
Hence, the correct option is \[ \boxed{(3)} \]
Was this answer helpful?
0
0
Top AP EAPCET Chemistry Questions
- The four quantum numbers of the valence electron of potassium are :
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
- In which of the following the election gain enthalpy of elements is correctly arranged?
- The radii of $ \text{F,}{{\text{F}}^{-}}\text{O} $ and $ {{\text{O}}^{2-}} $ are in the order
- Which of the following has the highest first ionization potential?
View More Questions
Top AP EAPCET Oxidation-Reduction Questions
- One mole of aqueous $ \text{SO}_3^{2-} $ is completely reacted with 2 moles of $ \text{Br}_2 (l) $. What is the oxidation state (s) of S in the product formed?
- An oxide of chlorine with water gives the strongest acid. The ratio of chlorine and oxygen in its formula is:
- According to Faraday's first law of electrolysis, the mass of substance deposited ($w$) is proportional to
- X, Y and Z represent three electrodes $Al^{3+}/Al$, $Cu^{2+}/Cu$ and $Ag^{+}/Ag$ with $E^{\circ}$ values -1.66, 0.34 and 0.80 V respectively. The correct order of oxidising power of these three electrodes is
- Given below are two statements: Statement I: The electrical conductivity of a solution decreases with dilution. Statement II: The overall reaction in $H_{2}-O_{2}$ fuel cell is: $2H_{2}O(l)\longrightarrow2H_{2}(g)+O_{2}(g)$. The correct answer is:
View More Questions
Top AP EAPCET Questions
- A body is projected from the ground at an angle of $\tan^{-1} \left( \frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
- The four quantum numbers of the valence electron of potassium are :
- A lens forms real and virtual images of an object, when the object is at $u_{1}$ and $u_{2}$ distances respectively. If the size of the virtual image is double that of the real image, then the focal length of the lens is (take, the magnification of the real image as $m$ )
- Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
View More Questions