The number of neutrons in tritium is

Choose the incorrect statement for deuterium.

The reaction of diborane in diethylether with $\underline{X}$ gives metal borohydride. $X$ is a

Which compound is used in hydrogen generators?

Metals of groups $7$,$8$,and $9$ do not form metallic hydrides. This is termed as

Which of the following statements is not true for hydrogen:
$1)$ It exists as a diatomic molecule.
$2)$ It has one electron in the outermost shell.
$3)$ It can lose an electron to form a cation which can freely exist.
$4)$ It cannot form ionic compounds.