A) \[\frac{\text{molar}\,\text{mass}}{\text{5}}\]
B) \[\frac{\text{molar}\,\text{mass}}{3}\]
C) \[\frac{\text{molar}\,\text{mass}}{\text{2}}\]
D) molar mass itself
Correct Answer: D
Solution :
The domain of the real function \[2K\overset{+7}{\mathop{M}}\,n{{O}_{4}}+2KOH\xrightarrow{{}}2{{K}_{2}}\overset{+6}{\mathop{M}}\,n{{O}_{4}}+{{H}_{2}}O+[O]\]Change in oxidation state of \[Mn=(+7)-(+\,6)\] \[=+\,1\] \[\therefore \]Eq. wt. of \[KMn{{O}_{4}}=\frac{\text{molar}\,\text{mass}}{\text{change}\,\text{in}\,\text{oxidation}\,\text{state}}\] \[\text{=}\,\,\frac{\text{molar}\,\text{mass}}{\text{1}}\text{=}\,\text{molar}\,\text{mass}\]
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