Please refer to Assignments Class 11 Chemistry Structure of Atom Chapter 2 with solved questions and answers. We have provided Class 11 Chemistry Assignments for all chapters on our website. These problems and solutions for Chapter 2 Structure of Atom Class 11 Chemistry have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Structure of Atom Assignments Class 11 Chemistry
Question. A hydrogen atom in its ground state absorbs 10.2 eV of energy. The orbital angular momentum is increased by (Given Planck constant h = 6.6 × 10-34 Jsec)
(a) 1.05 × 10-34 Jsec
(b) 3.16 × 10-34 Jsec
(c) 2.11 × 10-34 Jsec
(d) 4.22 × 10-34 Jsec
Answer
A
Question. In chromium atom, in ground state, the number of occupied orbitals is
(a) 14
(b) 15
(c) 7
(d) 12
Answer
B
Question. The value of Plancks constant is 6.63 × 10-34Js. The velocity of light is 3.0 × 108ms-1. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of 8 × 1015s-1
(a) 3 × 107
(b) 2 × 10-25
(c) 5 × 10-18
(d) 4 × 101
Answer
D
Question. Maximum number of electrons in a subshell with l = 3 and n = 4 is
(a) 10
(b) 12
(c) 14
(d) 16
Answer
C
Question. The magnetic quantum number specifies
(a) Size of orbitals
(b) Shape of orbitals
(c) Orientation of orbitals
(d) Nuclear Stability
Answer
C
Question. In a multi – electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic acid and electric fields?
(a) n = 1, l = 0, m = 0
(b) n = 2, l = 0, m = 0
(c) n = 2, l = 1, m = 1
(d) n = 3, l = 2, m = 1
(e) n = 3, l = 2, m = 0
(a) (a) and (b)
(b) (b) and (c)
(c) (c) and (d)
(d) (d) and (e)
Answer
D
Question. For principal quantum number n = 4, the total number of orbitals having l = 3 is
(a) 3
(b) 7
(c) 5
(d) 9
Answer
B
Question. In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?
(a) 3 → 2
(b) 5 → 2
(c) 4 → 1
(d) 2 → 5
Answer
B
Question. The electronic transitions from n = 2 to n = 1 will produce shortest wavelength in (where n = principal quantum state)
(a) Li2+
(b) He+
(c) H
(d) H+
Answer
A
Question. The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is
(a) 8.51 × 105 Jmol-1
(b) 6.56 × 105 Jmol-1
(c) 7.56 × 105 Jmol-1
(d) 9.84 × 105 Jmol-1/sup>
Answer
D
