Question:
The interstitial hydrides of which set of metals have same lattice as that of the parent metals?
The interstitial hydrides of which set of metals have same lattice as that of the parent metals?
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Interstitial hydrides are generally formed by transition metals. Hydrogen atoms occupy vacant spaces in the metal lattice without significantly disturbing the metallic structure.
Updated On: Jun 17, 2026
- Yb, Ti
- V, Zr
- Ni, Pd
- Cs, Cr
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The Correct Option is C
Solution and Explanation
Concept:
Hydrides are compounds formed when hydrogen combines with metals or non-metals.
Interstitial hydrides are formed mainly by:
• Transition metals
• \(d\)-block and \(f\)-block elements
In these hydrides:
• Hydrogen atoms occupy interstitial spaces in the metallic lattice
• The metallic crystal structure is generally retained
• Physical properties remain similar to parent metals
Some metals such as nickel and palladium absorb large amounts of hydrogen while preserving the original lattice arrangement.
Step 1: Understand interstitial hydrides. In interstitial hydrides:
• Small hydrogen atoms fit into octahedral or tetrahedral voids
• Parent metal lattice remains essentially unchanged
• These are non-stoichiometric compounds
Typical examples include: \[ \text{PdH}_x,\ \text{NiH}_x \]
Step 2: Examine option (A): Yb, Ti Ytterbium generally forms ionic hydrides rather than classical interstitial hydrides. Thus this pair is incorrect.
Step 3: Examine option (B): V, Zr Though vanadium and zirconium form hydrides, the question specifically asks for hydrides retaining the same lattice as parent metal in the classical sense. This pair is not the best correct match.
Step 4: Examine option (C): Ni, Pd Nickel and palladium:
• Form interstitial hydrides
• Hydrogen occupies lattice voids
• Metallic framework remains unchanged
Especially palladium is famous for absorbing hydrogen while retaining metallic lattice. Hence this pair satisfies the condition perfectly.
Step 5: Examine option (D): Cs, Cr Cesium forms ionic hydrides. Therefore this option is incorrect.
Step 6: Write the final answer. Hence, the correct pair is: \[ \boxed{\text{Ni, Pd}} \] Therefore, the correct option is: \[ \boxed{(C)} \]
• Transition metals
• \(d\)-block and \(f\)-block elements
In these hydrides:
• Hydrogen atoms occupy interstitial spaces in the metallic lattice
• The metallic crystal structure is generally retained
• Physical properties remain similar to parent metals
Some metals such as nickel and palladium absorb large amounts of hydrogen while preserving the original lattice arrangement.
Step 1: Understand interstitial hydrides. In interstitial hydrides:
• Small hydrogen atoms fit into octahedral or tetrahedral voids
• Parent metal lattice remains essentially unchanged
• These are non-stoichiometric compounds
Typical examples include: \[ \text{PdH}_x,\ \text{NiH}_x \]
Step 2: Examine option (A): Yb, Ti Ytterbium generally forms ionic hydrides rather than classical interstitial hydrides. Thus this pair is incorrect.
Step 3: Examine option (B): V, Zr Though vanadium and zirconium form hydrides, the question specifically asks for hydrides retaining the same lattice as parent metal in the classical sense. This pair is not the best correct match.
Step 4: Examine option (C): Ni, Pd Nickel and palladium:
• Form interstitial hydrides
• Hydrogen occupies lattice voids
• Metallic framework remains unchanged
Especially palladium is famous for absorbing hydrogen while retaining metallic lattice. Hence this pair satisfies the condition perfectly.
Step 5: Examine option (D): Cs, Cr Cesium forms ionic hydrides. Therefore this option is incorrect.
Step 6: Write the final answer. Hence, the correct pair is: \[ \boxed{\text{Ni, Pd}} \] Therefore, the correct option is: \[ \boxed{(C)} \]
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