Calcium imide on hydrolysis gives gas $(B)$ which on oxidation by bleaching powder gives gas $(C)$. Gas $(C)$ on reaction with magnesium gives compound $(D)$ which on hydrolysis again gives gas $(B)$. Identify $(B)$,$(C)$ and $(D)$.

Hydrogen accepts an electron to achieve the inert gas configuration. In this process,it behaves like which of the following?

What is Carbogen?

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

$N_2H_4$ and $H_2O_2$ show similarity in

Identify the correct statements from the following.
$(i)$ The number of hydrogen bonded water molecules in copper sulphate pentahydrate is one.
$(ii)$ Lanthanum and zirconium form non-stoichiometric hydrides.
$(iii)$ In solid form of $H_2O$, each oxygen is surrounded by six oxygen in octahedral positions at a distance of $276 \ pm$.