`H_(2(g))+M_(m)O_(s) overset(Delta)to mM_(s)+H_(2)O_(l)`
`(ii) CO(g)+2H_(2_(g)) underset("Catalyst")overset(Delta)to CH_(3)PH_(l)`
`(ii) CH_(3)H_(8_(g))+3H_(2)O_(g) underset("Catalyst")overset(Delta)to 3CO_(g)7H_(2_(g))`
`(iv) Zn_(s)+2NaOH_(aq) overset("heat")to Na_(2)zNo_(2_(aq))+H_(2_(g))`