Which metal does not react with cold water but evolves $H_2$ gas when reacted with steam?

What is the correct order of increasing basic strength for $MgO, SrO, K_2O$,and $NiO$?

$Li$ shows a diagonal relationship with:

The oxide of an element whose electronic configuration is $1s^{2} 2s^{2} 2p^{6} 3s^{1}$ is

$X$ and $Y$ are two metals. When burnt in air,$X$ forms only oxide while $Y$ forms oxide and nitride. The metals $X$ and $Y$ may be

The product obtained as a result of a reaction of nitrogen with $CaC_2$ is