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JEE Main 2023 · 29 Jan · Shift 1

JEE Main 2023 Chemistry question on Hydrogen and s-Block Elements

Which of the given compounds can enhance the efficiency of hydrogen storage tank?
  1. A.
    Li/P4\text{Li/P}_4
  2. B.
    Di-isobutylaluminium hydride
  3. C.
    SiH4\text{SiH}_4
  4. D.
    NaNi5\text{NaNi}_5
Show answer and solution

Correct option: D

Solution

LaNi₅ (the correct compound — likely a typo in the question) is a well-known intermetallic alloy that absorbs hydrogen reversibly by forming a metal hydride (LaNi₅H₆). It can store hydrogen at relatively low pressures and release it on demand, making it highly effective for enhancing hydrogen storage tank efficiency. This class of intermetallic compounds works via solid-state absorption, offering higher volumetric hydrogen density than compressed gas storage.

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