Question

An example of non-stoichiometric hydride is

• A. sodium hydride
• B. beryllium hydride
• C. lanthanum hydride
• D. diborane

Answer 1

Answer: (C)

lanthanum hydride

Answer 2

$LaH_{3}$ is a non-stoichiometric hydrides. These are hydrogen deficient compounds formed by the reaction of dihydrogen with d-block and f-block elements. These hydrides do not follow the law of constant composition