NEETChemistryHydrogen
Why are most hydrides of d-block and f-block elements considered non-stoichiometric?
Options
- AThey have a surplus of hydrogen atoms.
- BThey lack hydrogen atoms.
- CThey have a different lattice structure from their parent metals.
- DThey follow the law of constant composition.
Correct answer
C. They have a different lattice structure from their parent metals.
Step-by-step solution
Most hydrides of d-block and f-block elements are non-stoichiometric because they possess a different lattice structure from their parent metals, resulting in varying hydrogen content.