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.
Consider the following data:
- Heat of formation of \( CO_2(g) \) = -393.5 kJ mol\(^{-1}\)
- Heat of formation of \( H_2O(l) \) = -286.0 kJ mol\(^{-1}\)
- Heat of combustion of benzene = -3267.0 kJ mol\(^{-1}\)
The heat of formation of benzene is ……… kJ mol\(^{-1}\) (Nearest integer).
Which of the following is/are correct with respect to the energy of atomic orbitals of a hydrogen atom?
(A) \( 1s<2s<2p<3d<4s \)
(B) \( 1s<2s = 2p<3s = 3p \)
(C) \( 1s<2s<2p<3s<3p \)
(D) \( 1s<2s<4s<3d \)
Choose the correct answer from the options given below:
An ideal gas undergoes a cyclic transformation starting from point A and coming back to the same point by tracing the path A→B→C→D→A as shown in the three cases below.
Choose the correct option regarding \(\Delta U\):