Structure of Atom Quiz 12 – Punjab Meritorious School Preparation Portal

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If uncertainty in position and momentum are equal, then uncertainty in velocity is :

Which one of the following is not the characteristic of Planck’s quantum theory of radiation?

The energy is not absorbed or emitted in whole number or multiple of quantum

Radiation is associated with energy

Radiation energy is not emitted or absorbed continuously but in the form of small packets called quanta

This magnitude of energy associated with a quantum is proportional to the frequency

Question is mentioned below :

If the de-Broglie wavelength of a particle of mass m is 100 times its velocity, then its value in terms of its mass (m) and Planck’s constant (h) is

The energy absorbed by each molecule (A₂) of a substance is 4.4 × 10^–19 J and bond energy per molecule is 4.0 × 10^–19 J. The kinetic energy of the molecule per atom will be:

Question is mentioned below :

The shapes of the first three orbitals are similar but that of the fourth and fifth orbitals are different

The shapes of all five d-orbitals are similar

The shapes of the first four orbitals are similar but that of the fifth orbital is different

The shapes of all five d-orbitals are different

The magnetic moment of M^x+ (atomic number of M = 25) is B.M. The number of unpaired electrons and the value of x respectively are

4, 3

3, 4

3, 2

5, 2

The magnetic moments of Cu (Z = 29), Ti (Z = 22), and Cr (Z = 24) are in the ratio of

4 : √5 : 1

1 : √5 : 4

1 : 2 : 6

1 : √3 : √21

Which of the following graph correspond to one node

Number of protons, neutrons and electrons in the element ₈₉Y²³¹ is

89, 231, 89

89, 89, 242

89, 142, 89

89, 71, 89

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