First slide
Compounds of hydrogen
Question

This section contains questions each with two columns I and II. 
Match the items given in column I with that in the column II.

COLUMN - ICOLUMN - II
a.mixed oxidei.Metallic hydride
b.Non-stoichiometric compound ii.Magnetite
c.Covalent hydrideiii.Hydrolith
d.Salt-like hydrideiv.Hydrogen compounds of  non-metals

Moderate
Solution

.hydrogen with metals forms  metal hydrides in which it has negative charge, with non metal hydrides it forms positive charge

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