The rate of chemisorption is proportional to \( e^{-E_a / RT} \). Therefore, the ratio of rates is:
\[ \frac{r_{Pt}}{r_{Ni}} = \frac{e^{-E_a^{Pt} / RT}}{e^{-E_a^{Ni} / RT}} = e^{\frac{E_a^{Ni} - E_a^{Pt}}{RT}} \]
The logarithm of the ratio of chemisorption rates is approximately 2.
Given below are two statements:
Statement (I) : The dimensions of Planck’s constant and angular momentum are same.
Statement (II) : In Bohr’s model, electron revolves around the nucleus in those orbits for which angular momentum is an integral multiple of Planck’s constant.
In the light of the above statements, choose the most appropriate answer from the options given below:
List I (Spectral Lines of Hydrogen for transitions from) | List II (Wavelength (nm)) | ||
A. | n2 = 3 to n1 = 2 | I. | 410.2 |
B. | n2 = 4 to n1 = 2 | II. | 434.1 |
C. | n2 = 5 to n1 = 2 | III. | 656.3 |
D. | n2 = 6 to n1 = 2 | IV. | 486.1 |
Match List-I with List-II: List-I