For hydrogen storage materials:
• Look for compounds or alloys that form stable hydrides with high absorption capacities.
• Ensure reversibility of hydrogen absorption and release for practical applications.
\(Li/P_4\)
\(NaNi_5\)
\(SiH_4\)
- Hydrogen storage materials should exhibit properties such as high absorption capacity and easy reversibility.
- \(NaNi_5\) is a hydride-forming alloy that can efficiently store and release hydrogen under suitable conditions.
- Other options, such as \(Li/P_4, SiH_4, \)and di-isobutylaluminium hydride, do not possess such characteristics suitable for hydrogen storage.
The shortest wavelength of hydrogen atom in Lyman series is λ. The longest wavelength in Balmer series of He+ is
$56.0 \,L$ of nitrogen gas is mixed with excess of hydrogen gas and it is found that $20\, L$ of ammonia gas is produced The volume of unused nitrogen gas is found to be _______ $L$