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

2. Maximum number of electrons in a subshell can be

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

4. Number of unpaired electrons in N²⁺

5. 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:

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

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

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

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

10.  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

11. 3p orbital has _____ radial nodes

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

13. 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:

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

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

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

17. The orientation of atomic orbitals depends on their

18. 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)

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

20. The magnetic quantum number specifies