Question

Give to reason to prove that water is a compound and not an element. Name three metals which do not react with water , under normal conditions.

Answer 1

if an amount of current is passed through water $(\sim 10mA)$,we'll see gases are collected at the electrodes. so,water gets broken down by electrochemical processes.

an element can't be broken down to simpler substances by any chemical process,so,water is not an element.

metal having positive standard electrode potential $\left(E^{\circ }\right)$ volume (i.e less than $H^{+}$) do not react with water in normal conditions .

Eg :- Copper(Cu) Gold(Au) Mercury (Hg)