UNIT 2: Quantum Mechanical Model of Atom - Online Test
Q1. A
macroscopic particle of mass 100 g and moving at a velocity of 100 cm s–1
will have a de Broglie wavelength of
Answer : Option C
Explaination / Solution:
m = 100 g = 100 x 10-3 kg
= 100 cm s-1 = 100 x 10-2 m s-1
λ =h/mv
Q2. The
ratio of de Broglie wavelengths of a deuterium atom to that of an α - particle,
when the velocity of the former is five times greater than that of later, is
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. The
energy of an electron in the 3rd orbit of hydrogen atom is –E. The energy of an
electron in the first orbit will be
Answer : Option D
Explaination / Solution:
Q4. Time
independent Schnodinger wave equation is
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. Which
of the following does not represent the mathematical expression for the
Heisenberg uncertainty principle ?
Answer : Option D
Explaination / Solution:
No Explaination.
