Out of the two allotropic forms of dihydrogen,the form with lesser molecular energy is

Complete the following reactions:
$(i) \, H_{2(g)} + M_m O_{o(s)} \xrightarrow{\Delta }$
$(ii) \, CO_{(g)} + H_{2(g)} \xrightarrow[catalyst]{\Delta }$
$(iii) \, C_3 H_{8(g)} + 3 H_2 O_{(g)} \xrightarrow[catalyst]{\Delta }$
$(iv) \, Zn_{(s)} + NaOH_{(aq)} \xrightarrow{heat}$

Match List $I$ with List $II$

List $I$	List $II$
$A.$ Cobalt catalyst	$I.$ $(H_2 + Cl_2)$ production
$B.$ Syngas	$II.$ Water gas production
$C.$ Nickel catalyst	$III.$ Coal gasification
$D.$ Brine solution	$IV.$ Methanol production

Choose the correct answer from the options given below:

What is $X$ in the following reaction?
$CO + 2 H_2 \xrightarrow{X} CH_3 OH$

Which of the following is radioactive?

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 $276 \ pm$.