1. Which of the following sets of quantum numbers represents the highest energy of an atom?

2. The increasing order (lowest first) for the values of e/m (charge/mass) for

3. Number of unpaired electrons in N²⁺

4. The orientation of atomic orbitals depends on their

5. A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:

6. Which of the following element has least number of electrons in its M-shell?

7. A sub-shell with n = 6 , l = 2 can accommodate a maximum of

8. Which of the following statements does not form a part of Bohr’s model of hydrogen atom?

9.  A gas X has C_p and C_v ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms

10. Which of the following statements in relation to the hydrogen atom is correct?

11. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength

12. 3p orbital has _____ radial nodes

13. Which of the following statements does not form a part of Bohrs model of hydrogen atom?

14. In the Bohr’s model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is:

15. The magnetic quantum number specifies

16. In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom

17. The excitation energy of a hydrogen atom from its ground state to its third excited state is

18. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively:

19. Which one of the following sets of ions represents a collection of isoelectronic species? (Atomic nos.: F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

20. Maximum number of electrons in a subshell can be