Discuss why on exposure to air, sodium hydroxide becomes liquid and after sometime it changes to white powder.

On prolonged exposure to air, sodium finally changes to

Why pellets of potassium hydroxide become wet when exposed to air

Why does a dry cell becomes dead after a long time even if it has not been used?

Why do we see the sun sometime before sunrise and sometime after sunset?

Why is the ester hydrolysis slow in the beginning and becomes faster after sometime ?

Why a standard solution of sodium hydroxide (NaOH) cannot be prepared?

All metals become quite opaque when kept in air- why?

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -1: All alkali metals do not form superoxides as one of the main products in excess of air on heating. Statement - II: Superoxide reacts with carbon monoxide producing a white powder and liberating dioxygen.

A bicycle pump becomes hot when air is pumped into the tube. Why?

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement - I : Solution of sodium hydroxide can be stored in a vessel made of Zn or Al. Statement - II : Sodium ferrite on treatment with hot water produces sodium hydroxide.