JEE Questions for Chemistry Structure Of Atom Quiz 12 - MCQExams.com

Radial nodes present in 3s and 2p – orbitals are respectively
  • 0, 2
  • 2, 0
  • 2, 1
  • 1, 2
Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck’s constant h = 6.63 × 10–34 Js; speed of light c = 3 × 108 ms–1)
  • 6.67 × 1015
  • 6.67 × 1011
  • 4.42 × 10–15
  • 4.42 × 10–18
Which of the following are iso-electronic ?
  • Li and Be+
  • H- and He+
  • He and H
  • Be+ and H
An elements
  • is one type of atom
  • is two or more types of atom
  • has constant boiling point
  • has constant melting point

Chemistry-Structure of Atom-8099.png

  • Chemistry-Structure of Atom-8100.png
  • 2)
    Chemistry-Structure of Atom-8101.png

  • Chemistry-Structure of Atom-8102.png

  • Chemistry-Structure of Atom-8103.png
The value of Planck’s constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 1015 s–1?
  • 25
  • 50
  • 75
  • 10
The electronic configuration of a dipositive ion M2+ is 2, 8, 14 and its mass number is 56. The number of neutrons present is
  • 34
  • 32
  • 42
  • 30
An isobar of 20Ca40 is
  • 18Ar40
  • 20Ca38
  • 20Ca42
  • 18Ar38
The nucleus of an atom contains
  • proton and electron
  • neutron and electron
  • proton and neutron
  • proton, neutron and electron
Isoelectronic pair among the following is
  • Ca and K
  • Ar and Ca2+
  • K and Ca2+
  • Ar and K
Mg2+ is isoelectronic with
  • Cu2+
  • Zn2+
  • Na+
  • Ca2+
Which of the following make up an isotonic triad ?

  • Chemistry-Structure of Atom-8110.png
  • 2)
    Chemistry-Structure of Atom-8111.png

  • Chemistry-Structure of Atom-8112.png

  • Chemistry-Structure of Atom-8113.png

  • Chemistry-Structure of Atom-8114.png
The number of electrons and neutrons of an element is 18 and 20, respectively. Its mass number is
  • 2
  • 17
  • 37
  • 38
Which one of the following ions is not isoelectronic with O2- ?
  • Ti+
  • Na+
  • F-
  • N3-
Which one of the following sets of ions represents a collection of isoelectronic species ?
  • K+, Cl-, Ca2+, Sc3+
  • Ba2+, Sr2+, K+, S2-
  • N3-, O2-, F-, S2-
  • Li+, Na+, Mg2+, Ca2+
Ca2+ is isoelectronic with
  • Na+
  • Ar
  • Mg2+
  • Kr
The lightest particle is
  • α-particle
  • positron
  • proton
  • neutron
How many neutrons are present in tritium nucleus ?
  • 2
  • 3
  • 1
  • 0
Which one of the following has unit positive charge and 1 u mass ?
  • Electron
  • Neutron
  • Proton
  • None of these
Nuclear theory of the atom was put forward by
  • Rutherford
  • Aston
  • Neils Bohr
  • J J Thomson
Which particle contains 2 neutrons and 1 proton ?
  • 1H2
  • 2He4
  • 1T3
  • 1D2
Number of neutron in C12 is
  • 6
  • 7
  • 8
  • 9

Chemistry-Structure of Atom-8122.png

  • Chemistry-Structure of Atom-8123.png
  • 2)
    Chemistry-Structure of Atom-8124.png

  • Chemistry-Structure of Atom-8125.png

  • Chemistry-Structure of Atom-8126.png
Which of the following relation is incorrect regarding Bohr's theory?

  • Chemistry-Structure of Atom-8128.png
  • 2)
    Chemistry-Structure of Atom-8129.png

  • Chemistry-Structure of Atom-8130.png

  • Chemistry-Structure of Atom-8131.png
The emission spectrum of hydrogen discovered first and the region of the electromagnetic spectrum in which it belongs, respectively are
  • Lyman, ultraviolet
  • Lyman, visible
  • Balmer, utraviolet
  • Balmer, visible
The Balmer series in atomic hydrogen is observed in the following spectral region
  • infrared
  • ultraviolet
  • visible
  • far IR

Chemistry-Structure of Atom-8134.png
  • 1.214 × 10-7m
  • 2.816 × 10-7m
  • 6.500 × 10-7m
  • 8.500 × 10-7m
The transition of electron in H atom that will emit maximum energy is
  • n3 → n2
  • n4 → n3
  • n5 → n4
  • n4 → n5
Which of the following is not true in Rutherford's nuclear model of atom
  • Protons and neutrons are present inside the nucleus
  • Volume of nucleus is very small as compared to the volume of an atom
  • The number of protons and neutrons are always equal
  • The number of electrons and protons are always equal
When the electrons of hydrogen atom return to L shell from shells of higher energy, we get a series of lines in the spectrum. This series is called
  • Balmer series
  • Lyman series
  • Brackett series
  • Paschen series
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