Order Atomic Structure Assignment

Order Atomic Structure Assignment
31. Of the following Statements, the one, not proposed by Sir John Dalton in the atomic theory is
(a) Atoms are indivisible
(b) Atoms of same element are identical in all respects
(c) The mass of an atom can be changed into energy
(d) Atoms are smallest particle that take part in a chemical reaction
32. Consider an atom of atomic number Z. If energy required to remove a proton and electron are Ep
and Ee
respectively
then
(a) Ep
= ZEe
(b) Ep
Ee
(d) Ep
= 1837 Ee
33. The ratio of mass of a hydrogen ion and the electron that is removed from it, is approximately
(a) 1837 : 1 (b) 1 : 13.6 (c) 1 : 2.18 u 1018 (d) 1 : 1
34. The charge by mass ratio of an ion M is 4.2 u 106
C kg1
. The ion may be
(a) Ag (b) Cu (c) Cs (d) Na
35. The frequency of X rays produced by striking cathode rays on lithium metal will be (Given a = b = 1 in the Moseley’s
equation)
(a) 4 sec1 (b) 16 Hz (c) 2 sec1
(d) 40 sec1
36. The atoms 19
9 F and 35
17Cl are
(a) isotones (b) isodiaphers (c) isoelectronic (d) isosters
37. The number of neutrons present in a phosphonium ion is 31 1 ª º ¬ ¼ 15 1 P, H
(a) 16 (b) 17 (c) 18 (d) 19
38. Which of the following is not a limitation to the Rutherford’s model of atom
(a) It could not explain based on Maxwell’s law of electrodynamics
(b) It could not explain spectral lines
(c) It could not account for discontinuity in spectrum
(d) It could not explain electrical neutrality of atom
39. Two photons of wavelength 400 Å and 800 Å are absorbed by a gas and emitted as a single radiation. Assuming no
loss, wavelength of emitted radiation is approximately
(a) 600 Å (b) 800 Å (c) 267 Å (d) 1200 Å
40. The wrong Statement about matter waves is
(a) They move with speed of light.
(b) They cannot be radiated into empty space.
(c) They are associated with the particle under consideration.
(d) They generally have small wavelength.
41. Two monochromatic radiations with wavelengths of 4 u 106
m and 8 u 104
m, differ by an energy of
(a) 5 u 1010 J (b) 5 u 1020 J (c) 5 u 1032 J (d) 5 u 108
J
Atomic Structure 3.49
42. An electron in the 5s orbital, has an orbital angular momentum of