KMnO4 Heating Reaction Details
Heating potassium permanganate ($KMnO_4$) results in its thermal decomposition. The products formed depend critically on the temperature.
At a temperature of $513\text{ K}$ (approximately $240^\circ C$), the chemical reaction that occurs is:
$2KMnO_4 \xrightarrow{513 \text{ K}} K_2MnO_4 + MnO_2 + O_2$
Green Paramagnetic Species Identification
This decomposition reaction produces potassium manganate ($K_2MnO_4$), manganese dioxide ($MnO_2$), and oxygen ($O_2$).
Among these products, potassium manganate ($K_2MnO_4$) is identified as the green solid. It is also paramagnetic because the manganese atom in the manganate ion ($MnO_4^{2-}$) has unpaired electrons in its $d$-orbitals ($Mn$ is in +4 oxidation state). $MnO_2$ is brown-black and typically considered antiferromagnetic or weakly paramagnetic, and $O_2$ is paramagnetic but gaseous.
Thus, the green paramagnetic species formed is $K_2MnO_4$.
Similar Questions
Match List I with List II :
List I (Transition metal/compound) List II (Catalytic Role) A. $V_2O_5$ I. Preparation of ammonia from $N_2/H_2$ mixture B. Fe II. Polymerisation of alkynes C. $PdCl_2$ III. Preparation of $H_2SO_4$ from $SO_2$ D. Ni complex IV. Oxidation of ethyne to ethanal Choose the correct answer :
- Identify the incorrect statement from the following :
Identify the correct statement about $ClF_3$ from the following options :
The correct formal charges on oxygen atoms numbered 2, 1 and 3 respectively in ozone are :
- Match the species in List I with their geometry in List II
List I List II A. $PCl_5$ I. Tetrahedral B. $BrF_5$ II. Square Planar C. $BF_4^-$ III. Trigonal bipyramidal D. $[Ni(CN)_4]^{2-}$ IV. Square pyramidal
Choose the correct answer from the options given below: - Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The first ionization enthalpy of O is lower than that of N and F.
Reason R : The loss of an electron from O leads to stable half-filled p orbital.
In light of the above statements, choose the most appropriate answer from the options given below: - According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is
- Given below are two statements:
Statement-I : $[Fe(ox)_3]^{3-}$ is chiral.
Statement-II : $trans-[Cr(H_2O)_2(ox)_2]^-$ is chiral.
(Given : $oxH_2 = HOOC-COOH$)
In light of the above statements, choose the most appropriate answer from the options given below: - Given below are two statements:
Statement-I : Heating NaCl with concentrated $H_2SO_4$ and $MnO_2$ results in oxidation of Mn.
Statement-II : Heating NaI with concentrated $H_2SO_4$ and $MnO_2$ results in reduction of Mn.
In light of the above statements, choose the most appropriate answer from the options given below: - The highest occupied molecular orbital for $Ne_2$ is
Important Questions from Inorganic Chemistry
- A chromium complex with a formula $\text{CrCl}_3\cdot 6\text{H}_2\text{O}$ has a spin only magnetic moment value of $3.87 \text{ BM}$ and its solution conductivity corresponds to $1 : 2$ electrolyte. $2.75 \text{ g}$ of the complex solution was initially passed through a cation exchanger. The solution obtained after the process was reacted with excess of $\text{AgNO}_3$. The amount of $\text{AgCl}$ formed in the above process is _____ g. (Nearest integer)
[Given: Molar mass in $\text{g mol}^{-1}$ $\text{Cr} : 52; \text{Cl}: 35.5, \text{Ag}: 108, \text{O}: 16, \text{H}: 1$] - Consider the following reactions :
$\text{NaCl} + \text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 \rightarrow \text{A} + \text{KHSO}_4 + \text{NaHSO}_4 + \text{H}_2\text{O}$
$\text{A} + \text{NaOH} \rightarrow \text{B} + \text{NaCl} + \text{H}_2\text{O}$
$\text{B} + \text{H}_2\text{SO}_4 + \text{H}_2\text{O}_2 \rightarrow \text{C} + \text{Na}_2\text{SO}_4 + \text{H}_2\text{O}$
In the product 'C', 'X' is the number of $\text{O}_2^{2-}$ units, 'Y' is the total number oxygen atoms present and 'Z' is the oxidation state of Cr. The value of X + Y + Z is ____________. - Identify the metal ions among $\text{Co}^{2+}, \text{Ni}^{2+}, \text{Fe}^{2+}, \text{V}^{3+}$ and $\text{Ti}^{2+}$ having a spin-only magnetic moment value more than $3.0\text{ BM}$. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is __________.
The crystal field splitting energy of $[\text{Co(oxalate)}_3]^{3-}$ complex is '$n$' times that of the $[\text{Cr(oxalate)}_3]^{3-}$ complex. Here '$n$' is ___________. (Assume $\Delta_o >> P$)
- Which of the following is the structure of pyrosulphuric acid?
