The highest industrial consumption of molecular hydrogen is to produce compounds of element ...... .

The hydride ions $({H^{-}})$ are isoelectronic with

In the water-gas shift reaction,hydrogen gas is produced from the reaction of steam with

State whether the following statements are True or False:
$(1)$ The metal and non-metal elements of $d$-block react with hydrogen to give molecular hydrides.
$(2)$ At normal temperature,dihydrogen reacts violently with dioxygen.

Which of the following is true for the industrial production of hydrogen from water gas $(CO + H_2)$?

Pure dihydrogen $(99.95\%)$ is obtained by the electrolysis of