Structure of Atom Quiz 13 – Punjab Meritorious School Preparation Portal

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

n = 3, l = 0, m = 0, s = +1/2

n = 3, l = 1, m = 1, s = +1/2

n = 3, l = 2, m = 1, s = +1/2

n = 4, l = 0, m = 0, s = +1/2

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is ( h = 6.6 × 10^–34 kg m²s^–1, mass of electron, em = 9.1 × 10^–31 kg)

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

The energy required to break one mole of Cl – Cl bonds in Cl₂ is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 10⁸ ms^–1 and N_A= 6.02 × 10²³ mol^–1)^.

594 nm

640 nm

700 nm

494 nm

If n = 6, the correct sequence for filling of electrons will be :

ns → (n – 2) f → (n – 1) d → np

ns → (n – 1) d → (n – 2) f → np

ns → (n – 2) f → np → (n – 1) d

ns → np → (n – 1) d → (n – 2) f

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

n = 6 to n = 1

n = 5 to n = 4