When compared with alkaline earth metals, the alkali metals have

The word 'alkali' used for alkali metals indicates:

Which one of the alkali metals forms only the normal oxide,$M_2O$,on heating in air?

The general formula of zeolite is $Na_2 Z$. In this,'$Z$' represents:

The correct statement$(s)$ among $I$ to $III$ with respect to potassium ions that are abundant within the cell fluids is/are :
$I.$ They activate many enzymes
$II.$ They participate in the oxidation of glucose to produce $ATP$
$III.$ Along with sodium ions,they are responsible for the transmission of nerve signals

Which of the alkali metal chloride $(MCl)$ forms its dihydrate salt $(MCl.2H_2O)$ easily?