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Non-stoichiometric hydrides are produced by:

1. palladium, vanadium
2. manganese, lithium
3. nitrogen, filorine
4. carbon, nockel

Correct answer: palladium, vanadium

Solution

Non-stoichiometric hydrides are typically formed by transition metals that can accommodate hydrogen atoms in interstitial sites, giving variable H:M ratios. Palladium and vanadium are classic examples of such metals.

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