Structure of Atom

Hinsberg’s reagent is:

• C₆H₅SO₂Cl

• SOCl₂

• (COCl)₂

• C₆H₅COCl

If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength λ, then for 1.5 p momentum of the photoelectron, the wavelength of the light should be: (Assume kinetic energy of ejected photoelectron to be very high in comparison to work function) :

• $\frac{2}{3}\mathrm{\lambda }$

• $\frac{4}{9}\mathrm{\lambda }$

• $\frac{3}{4}\mathrm{\lambda }$

• $\frac{1}{2}\mathrm{\lambda }$

The degenrate orbitals of [Cr(H₂O)₆]³⁺ are

• d_yz and d_z2

• d_x2 and d_xz

• d_xz and d_yz

• ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}$and d_xy

Among the following, the molecule expected to be stabilized by anion formation is: 

C₂, O₂, NO and F₂

• NO

• C₂

• F₂

• O₂

For any given series of spectral lines of atomic hydrogen, let $∆\overline{\mathrm{v}} = {\overline{\mathrm{v}}}_{\max } - {\overline{\mathrm{v}}}_{\min }$ be the difference in maximum and minimum frequencies in cm^-1. The ratio $∆{\overline{\mathrm{v}}}_{\mathrm{Balmer}}$ is:

• 4 : 1

• 9 : 4

• 5 : 4

• 27.5

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are:

• Paschen and Pfund

• Lyman and Paschen

• Brackett and Pfund

• Balmer and Brackett