The metal which gives hydrogen on treatment with acid as well as sodium hydroxide is

All compounds of alkali metals are easily soluble in water,but lithium compounds are more soluble in organic solvents. Explain.

Assertion : $KOH$ is more soluble in water than $NaOH$.
Reason : $NaOH$ is a stronger base than $KOH$.

When sodium $(Na)$ metal is dissolved in liquid ammonia $(NH_3)$, it imparts a blue colour to the solution. This blue coloration is due to:

Potassium permanganate,on heating,gives:

Identify the element forming peroxide on reaction with oxygen.