Atomic Structure - Multiple Choice Questions

1. Any p-orbital can accommodate up to

a. four electrons
b. two electrons in parallel groups
c. six electrons
d. two electrons with opposite spins
(JEE 1983)

Answer ( c )

2. the principal quantum number of an atom is related to the

a. size of the orbital
b. spin angular momentum
c. orbital angular momentum
d. orientation of the orbital in space
(JEE 1983)

Answer: (a)

3. Correct set of four quantum numbers forhte valence (outmost) electron of rubidium 9Z = 37) is:

a. 5,0,0,+1/2
b. 5,1,0, +1/2
c. 5,1,1,+1/2
d. 6,0,0,+1/2
(JEE 1984)

Answer: (a)

4. Bohr model can explain:

a. the spectrum of hydrogen atom only
b. spectrum of an atom or ion containing one electron only.
c. the spectrum o hydrogen molecule
d. the solar spectrum
(JEE 1985)

Ans: (b)

5. Which one of the following sets of quantum numbers(n,l,ml, ms) represents as impossible arrangement?
a. 3,2,-2,1/2
b. 4,0,0,1/2
c. 3,2,-3,1/2
d. 5,3,0,-1/2
(JEE 1986)

Answe ( c )