In all its properties,hydrogen resembles

Which of the following statements is $NOT$ correct regarding dihydrogen $(H_2)$?

Which compound on electrolysis produces $H_2$ gas at both electrodes?

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.

Lithium aluminium hydride reacts with silicon tetrachloride to form:

Heavy water is: