Structure of Atom Quiz 10 – Punjab Meritorious School Preparation Portal

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The number of nodal planes in a px orbital is

one

two

three

zero

The ratio of magnetic moments of Fe(III) and Co(II) is

7 : 3

3 : 7

√7 ∶ √3

√3 ∶ √7

The orbital diagram in which the Aufbau principle is violated is :

2s 2p

If the nitrogen atom has electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s²2s²2p³, because the electrons would be closer to the nucleus. Yet 1s⁷ is not observed because it violates.

Heisenberg uncertainty principle

Hund's rule

Pauli exclusion principle

Bohr postulate of stationary orbits

If a proton and α-particle are accelerated through the same potential difference, the ratio of de-Broglie wavelengths λp and λα is

2√2

The ions O^2–, F^–, Na⁺, Mg²⁺ and Al³⁺ are isoelectronic. Their ionic radii show

If the shortest wavelength of the spectral line of H-atom in the Lyman series is X, then the longest wavelength of the line in Balmer series of Li²⁺ is

x/9

4x/5

5x/4

In hydrogen atom, energy of first excited state is –3.4 eV. Find out KE of the same orbit of Hydrogen atom

+ 3.4 eV

+ 6.8 eV

– 13.6 eV

+ 13.6 eV

Given : The mass of electron is 9.11 × 10^–31 kg Plank constant is 6.626 × 10^–34 Js, the uncertainty involved in the measurement of velocity within a distance of 0.1 Å is

The size of isoelectronic species C^4–, N^3– and Mg²⁺ is affected by

nuclear charge (Z)

principle quantum number

interelectronic repulsion

None of these

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