Which of the following is an incorrect match?

Write a short note on Dihydrogen.

Which of the following pairs will not produce dihydrogen gas?

State True or False for the following statements:
$1$. Metals of group $7$,$8$ and $9$ form non-stoichiometric hydrides.
$2$. Pure dihydrogen is obtained by heating hydrocarbons with $H_2O$ vapour in the presence of a $Ni$ catalyst at $1270 \ K$.
$3$. The ionization enthalpy of hydrogen is higher than that of alkali metals.
$4$. Some chemical properties of hydrogen resemble both metals and non-metals.

Which of the following properties of hydrogen is similar to the halogen family?

Which is distilled first?