Structure of Atom MCQ Quiz - Multiple Choice Questions & Answers

1. For which of the following set of quantum numbers, an electron will have the highest energy?

1. 3, 2, +1, +1/2
2. 4, 1, 0, -1/2
3. 4, 2, -1, +1/2
4. 5, 0, 0, +1/2

2. Which of the following atoms or ion/atom have identical ground state configuration?

1. Li⁺ and He⁺
2. Na and K
3. Cl^- and Ar
4. F⁺ and Ne

3. A g-sub shell is characterized by

1. n=5
2. m=3
3. l= 4
4. l= 5

4. Which expression represents de-Broglie relationship?

1. h/mv = ρ
2. λ= h/mρ
3. h/mv = λ
4. mλ = v/ρ

5. The number of spherical nodes for 4d orbital is

1. Zero
2. Two
3. One
4. Three

6. The configuration 1s², 2s², 2p⁵, 3s¹ shows

1. Ground state of fluorine
2. Excited state of neon
3. Excited state of fluorine
4. Excited state of O₂^- ion

7. The electronic configuration of Cu⁺² ion is;

1. [Ar} 4s¹ 3d⁸
2. [Ar] 4s¹ 3d¹⁰
3. [Ar] 4s² 3d¹⁰ 4p¹
4. [Ar] 3d⁹

8. Which of the following orbitals has dumb-bell shape

1. s
2. p
3. d
4. f

9. The total number of orbitals in a shell having principle quantum number n is;

1. 2n
2. n²
3. 2n²
4. (n+l)

10. Bohrs radius for H-atom(n=1) is approximately0.53A^o. The radius of the first excited (n=2) is;

1. 0.13 A^o
2. 1.06A^o,
3. 4.77A^o
4. 2.12A^o