Potassium manganate (K_2MnO_4) is not formed | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) $1.$ Thermal decomposition of $KMnO_4$: $2 KMnO_4 \xrightarrow{\Delta } K_2MnO_4 + MnO_2 + O_2$. Here,$K_2MnO_4$ is formed.$2.$ Reaction of $KMnO_

Vedclass · Accepted Answer

$KMnO_4 + H_2SO_4 	ext{ (conc.)} \xrightarrow{\Delta }$

Vedclass · Answer

(D) $1.$ Thermal decomposition of $KMnO_4$: $2 KMnO_4 \xrightarrow{\Delta } K_2MnO_4 + MnO_2 + O_2$. Here,$K_2MnO_4$ is formed.$2.$ Reaction of $KMnO_4$ with concentrated $KOH$: $4 KMnO_4 + 4 KOH \xrightarrow{\Delta } 4 K_2MnO_4 + O_2 + 2 H_2O$. Here,$K_2MnO_4$ is formed.$3.$ Fusion of $MnO_2$ with $KOH$ in the presence of air: $2 MnO_2 + 4 KOH + O_2 \xrightarrow{\Delta } 2 K_2MnO_4 + 2 H_2O$. Here,$K_2MnO_4$ is formed.$4.$ Reaction of $KMnO_4$ with concentrated $H_2SO_4$: $KMnO_4 + H_2SO_4 	ext{ (conc.)} \xrightarrow{\Delta } K_2SO_4 + Mn_2O_7 + H_2O$. In this reaction,manganese heptoxide $(Mn_2O_7)$ is formed,not potassium manganate $(K_2MnO_4)$.

Column $A$	Column $B$
$(1)$ Brass	$(a)$ $Ni$ $(60\%)$,$Cr$ $(40\%)$
$(2)$ Bronze	$(b)$ $Cu$ $(80\%)$,$Sn$ $(20\%)$
$(3)$ Cupronickel	$(c)$ $Cu$ $(90\%)$,$Sn$ $(10\%)$
$(4)$ Nichrome	$(d)$ $Cu$ $(70\%)$,$Zn$ $(30\%)$
	$(e)$ $Cu$ $(75-85\%)$,$Ni$ $(15-25\%)$

Potassium manganate $(K_2MnO_4)$ is not formed in which of the following reactions?

Similar Questions

The amphoteric oxide among $V_2O_3$,$V_2O_4$,and $V_2O_5$ upon reaction with alkali leads to the formation of an oxide anion. The oxidation state of $V$ in the oxide anion is:

When a mixture of manganese dioxide,potassium hydroxide and potassium chlorate is fused,the product obtained is

$Cu^{2+}$ aqueous solution has . . . . . . colour.

Match Column $A$ with Column $B$:

Column $A$ Column $B$

$(1)$ Brass $(a)$ $Ni$ $(60\%)$,$Cr$ $(40\%)$

$(2)$ Bronze $(b)$ $Cu$ $(80\%)$,$Sn$ $(20\%)$

$(3)$ Cupronickel $(c)$ $Cu$ $(90\%)$,$Sn$ $(10\%)$

$(4)$ Nichrome $(d)$ $Cu$ $(70\%)$,$Zn$ $(30\%)$

$(e)$ $Cu$ $(75-85\%)$,$Ni$ $(15-25\%)$

In the reaction $4K_2Cr_2O_7 \xrightarrow{\text{heat}} 4K_2CrO_4 + 3O_2 + X$,identify $X$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module