Structure of Atom

The photoelectric current from Na (work function, w? = 2.3eV) is stopped by the output voltage of the cell
Pt(s)/H?(g, 1 bar) | HCl (aq., pH = 1)|AgCl(s)|Ag(s).
The pH of aq. HCl required to stop the photoelectric current from K(w? = 2.25 eV), all other conditions remaining the same, is * 10?² (to the nearest integer).
Given,
2.303(RT/F) = 0.06 V; E°(AgCl|Ag|Cl?) = 0.22 V

The work function of sodium metal is 4.41 * 10⁻¹⁹ J. If photons of wavelength 300 nm are incident on the metal, the kinetics energy of the ejected electrons will be (h = 6.63 * 10⁻³⁴ Js; c = 3 * 10⁸ m/s) * 10⁻²¹ J. [numerical value].

The number of subshells associated with n=4 and m=-2 quantum numbers is:

The figure that is not a direct manifestation of the quantum nature of atom is

The figure that is not a direct manifestation of the quantum nature of atom is:

The increasing order of pK♭ values of the following compounds is:

The correct statement about probability density (except at infinite distance from nucleus) is: