Question

$Mn{{O}_ {2}} +KOH+{{O}_ {2}} \xrightarrow {\Delta }2{{K}_ {2}} Mn{{O}_ {4}} +4{{H}_ {2}} O$. If true enter 1 else o.
(a) 1
(b) 0

Answer 1

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Complete step by step answer:
We have been provided with a chemical reaction: $Mn{{O}_ {2}} +KOH+{{O}_ {2}} \xrightarrow {\Delta }2{{K}_ {2}} Mn{{O}_ {4}} +4{{H}_ {2}} O$,

We need to tell if this chemical reaction is possible or not,
Chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
For a reaction to be feasible at a given temperature, it must happen spontaneously, which means no extra energy needs to be put in for the reaction to occur. A reaction only occurs spontaneously if the Gibbs free energy change is less than zero.
Now, in an alkaline medium, Mn has a stable oxidation state +6. In the presence of $KOH$. $Mn{{O}_ {2}}$​ reacts in the presence of atmospheric oxygen to form ${{K}_ {2}} Mn{{O}_ {4}}$ which is a green coloured product.
So, we can say that the reaction: $Mn{{O}_ {2}} +KOH+{{O}_ {2}} \xrightarrow {\Delta }2{{K}_ {2}} Mn{{O}_ {4}} +4{{H}_ {2}} O$ is feasible,
So, the correct answer is “Option A”.

Note: Magnesium dioxide is used as a colorant and decolourizer in glass, white ware, enamels and pottery. It is also used in battery cathode mixes and electronics. There is promising potential to use magnesium dioxide in solid state lithium-ion batteries for automobiles. Magnesium oxide is used in ferromagnetic ferrites and as a catalyst.