Chemistry - Complete s-block Question with Solution | TestHub

All alkali-metal salts impart a characteristic colour to the Bunsen flame.

The correct order of increasing thermal stability of the carbonates of alkali metals is ${\mathrm{Li}}_2{\mathrm{CO}}_3<$ ${\mathrm{Na}}_2{\mathrm{CO}}_3<{\mathrm{K}}_2{\mathrm{CO}}_3<{\mathrm{Rb}}_2{\mathrm{CO}}_3<{\mathrm{Cs}}_2{\mathrm{CO}}_3$.

Among the alkali metal's cesium is the most reactive

The reducing character of the alkali metal hydrides follow the order :

LiH > NaH > KH > RbH > CsH.