The Question is from neet-chemistry , and it was created by the author THIRUPATHI REDDY

Question

An explosion takes place when conc. ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$ is added to ${\rm{KMn}}{{\rm{O}}_4}$.Which of the following is formed?

THIRUPATHI REDDY · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [A]
## CONCEPT FRAMEWORK
	**Primary Concept**: Reaction of potassium permanganate with concentrated sulfuric acid.
	**Related Topics**: Oxidation states of manganese, explosive reactions, dehydrating nature of sulfuric acid.
	**Prerequisites**: Knowledge of the common oxidation states of manganese, the chemical properties of permanganate, and the nature of concentrated sulfuric acid.
## SOLUTION PATHWAY
**Given Information**:
	Reaction between concentrated sulfuric acid and potassium permanganate.
	Explosive reaction occurs.
**Method & Steps**:
	1. **Identify the reaction**: Concentrated sulfuric acid acts as a strong dehydrating agent and protonates permanganate. The permanganate ion ($MnO_4^-$) in acidic conditions forms highly unstable manganese heptoxide ($Mn_2O_7$).
		Reasoning: The concentrated sulfuric acid provides protons and dehydrates the permanganate ion.
		Formula/Rule: $2KMnO_4 + 2H_2SO_4 ightarrow Mn_2O_7 + K_2SO_4 + 2H_2O$
	2. **Understand the instability**: $Mn_2O_7$ is a highly unstable, explosive compound. It can decompose into $MnO_2$ and oxygen.
		Working: The explosive nature of the reaction is due to the formation of unstable $Mn_2O_7$.
		Key Point: The reaction is highly exothermic and can lead to an explosion.
	3. **Select the correct option**: Based on the reaction, the correct product is $Mn_2O_7$.
		Result: $Mn_2O_7$ is formed.
		Verification: The formation of $Mn_2O_7$ is a known reaction.
 ## OPTION ANALYSIS
[A] ✓: $Mn_2O_7$ is formed as a highly unstable and explosive compound in the reaction of potassium permanganate with concentrated sulfuric acid.
[B] :x: $MnO_2$ is a stable compound and not the initial product of the reaction. It may form if $Mn_2O_7$ decomposes. 
[C] :x: $MnSO_4$ forms when $KMnO_4$ reacts in dilute sulfuric acid (a redox reaction) and not in concentrated sulfuric acid where dehydration takes place.
[D] :x: $Mn_2O_3$ is a stable compound and does not form in this reaction.
 ## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing the reaction with dilute sulfuric acid, where a redox reaction and formation of $MnSO_4$ occurs. [How to avoid]: Pay attention to the concentration of sulfuric acid.
		2.[Error 2]: Assuming that the reaction would lead to a stable manganese oxide. [How to avoid]: Remember that concentrated sulfuric acid dehydrates the permanganate ion leading to an unstable oxide.
	**Quick Tips**:
		1.[Helpful shortcut]: Remember the highly unstable nature of $Mn_2O_7$.
		2.[Memory aid]: Associate concentrated sulfuric acid with dehydration and formation of the unstable oxide.

THIRUPATHI REDDY · Answer

The correct Option is "${\rm{M}}{{\rm{n}}_2}{{\rm{O}}_7}$"

THIRUPATHI REDDY · Answer

${\rm{Mn}}{{\rm{O}}_2}$

THIRUPATHI REDDY · Answer

${\rm{MnS}}{{\rm{O}}_4}$

THIRUPATHI REDDY · Answer

${\rm{M}}{{\rm{n}}_2}{{\rm{O}}_3}$

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