Liquid ammonia is used for refrigeration because

What do you understand by the terms: $(i)$ hydrogen economy,$(ii)$ hydrogenation,$(iii)$ 'syngas',$(iv)$ water-gas shift reaction,and $(v)$ fuel-cell?

Hydrogen is

The synonym for water gas when used in the production of methanol is:

Consider the following sequence of reactions: $Na + NH_{3(g)} \to [X]$ $\xrightarrow{N_2O} [Y]$ $\xrightarrow{\text{Heat}} [Z] (\text{Gas, Pure})$. Identify $[Z]$ gas.

Hydrogen gains an electron to achieve the configuration of a noble gas. It behaves like which of the following?