Lithium shows diagonal relationship with

If $Na$ is heated in the presence of air,it forms:

Which of the following metals will react with water?

How is $NaCl$ prepared from brine (sea water)?

In which of the following processes,fused sodium hydroxide is electrolysed at a $330 \ ^oC$ temperature for the extraction of sodium?

The alkali metals form salt-like hydrides by direct synthesis at elevated temperatures. The thermal stability of these hydrides decreases in which of the following orders?