Ionisation of $H$-atom would produce

Which of the following is obtained when dihydrogen reacts with the alkali metals at high temperature?

Comment on the reactions of dihydrogen with $(i)$ chlorine,$(ii)$ sodium,and $(iii)$ copper $(II)$ oxide.

Arrange the following:
$(i)$ $CaH_2$,$BeH_2$ and $TiH_2$ in order of increasing electrical conductance.
$(ii)$ $LiH$,$NaH$ and $CsH$ in order of increasing ionic character.
$(iii)$ $H-H$,$D-D$ and $F-F$ in order of increasing bond dissociation enthalpy.
$(iv)$ $NaH$,$MgH_2$ and $H_2O$ in order of increasing reducing property.

In $para-hydrogen$,what is the nature of the electron spin?

In which of the following processes is the highest purity $(99.9 \%)$ hydrogen obtained?