In which of the following hydrides, hydrogen exists in negative oxidation state?

In which of the following compound does hydrogen exhibit a negative oxidation state:

In which of the following compound does hydrogen exhibit a negative oxidation state:

Can hydrogen exist in -1 oxidation state?

Iodine can exist in the oxidation states :

Name and write the formula of one compound each of hydrogen in which , hydrgen exists in negative oxidation state.

In which of the following compounds does hydrogen has an oxidation state of -1?