GATE CY 2015 Question Paper (31-Jan-2015) (Shift 1)

The difference in the ground state energies (kJ/mol) of an electron in one-dimensional boxes of lengths 0.2 nm and 2 nm is ________

The mean ionic activity coefficient of 0.001 molal $ZnS{O}_4$ (aq) at 298 K according to the Debye- Hückel limiting law is (Debye-Hückel constant is 0.509 $mola{l}^{-\text{½}}$) ________

The process given below follows the Langmuir adsorption isotherm.
$A_2$ (g) $\stackrel{K_1}{\underset{K_{-1}}{\rightleftharpoons }}$ 2 $A_{ads}$
If $\theta$ denotes the surface coverage and P denotes the pressure, the slope of the plot of $1/\theta$ versus $1/\sqrt{P}$ is

For a gas phase unimolecular reaction at temperature 298 K, with a pre-exponential factor of $2.17\times 10^{13}{s}^{-1}$, the entropy of activation (J $K^{-1}mo{l}^{-1}$) is ________

A liquid has vapor pressure of $2.02\times 10^{3}N{m}^{-2}$ at 293 K and heat of vaporization of 41 kJ $mo{l}^{-1}$. The boiling point of the liquid (in Kelvin) is ________