Multiple choice Questions
Qno.1 Atomic theory was announced by Dalton in ?
a)1895
b)1905
c)1708
d)1808
Qno.2 In 1891 J.J Thomson famous experiment relating to the passage of electric current through.
a) A solid
b) A gas
c) A solid
d) A plasma
Qno.3 By passing an electric discharge through a gas at low pressure,the electron was discovered by.
a) Rutherford
b) Milliken
c) Chadwick
d) J.J Thomson
Qno.4 The electron was by J.J Thomson by passing an Electric discharge through.
a) A Solid
b) A Liquid
c) A gas at low pressure
d) A gas at low pressure
Qno.5 Charge on an electron was determined by.
a) Ampere
b) Maxwell
c) Millikan
d) Thomson
Qno.6 The charge on electron was determined by Milliken in .
a) 1905
b) 1895
c) 1909
d) 1918
Qno.7 According to Rutherford model of atom,the positive charge in an atom.
a) Is uniformly spread throughout its volume.
b) Is concentrated at its centre
c) Is at s certain distance front its centre.
d) Is scattered by £ particle
Qno.8 Rutherford bombarded a thin sheet of gold with.
a) X-ray
b) a_particles
Qno.9 Rutherford determined the size (diameter) of the nucleus to be equal to.
a) 10- ¹⁴
b) 10-¹⁵
c) 10-¹³
d) 10-¹²
Qno.10 Rutherford bombarded nitrogen with alpha particles to discover.
a) Electron
b) Neutron
c) Proton
d) X-ray
Qno.11 Proton was discovered by Rutherford in.
a) 1913
b) 1915
c) 1920
d) 1920
Qno.12 Chadwick discovered neutron by the study of scattering of alpha particles from.
a) Gold foil
b) Nitrogen
c) Beryllium
d) Oxygen
Qno.13 Chadwick discovered in 1992.
a) Proton
b) Neutron
c) Atom
d) Photon
Qno.14 Neutron was discovered by.
a) Curie
b) Roentgen
c) Rutherford
d) Chadwick
Qno.15 An Atomic radius of the order of
a) 10-¹⁴
b) 10-¹³
c) 10-¹¹
d) 10-¹⁰
Qno.16 Neutron and protons in the nucleus are together called.
a) Photon
b) Mesons
c) Atomic particles
d) Nucleons
Qno.17 Charge on Neutron is
a) +1.6×10-¹⁹ C
b) Zero
c) -1.6×10-¹⁹ C
d) 1.2×10-¹⁹ C
Qno.18 A particle having the mass of an electron and the charge of a proton is called a .
a) Antiproton
b) Gamma rays
c) Position
d) Photon
Qno.19 The Nucleus consists of
a) Protons and neutrons
b) Protons and Electrons
c) Proton only
d) Electrons and neutrons
Qno.20 Nuclei of different elements are identified by their.
a) Atomic mass number
b) Atomic number
c) Nuclear mass
d) Nuclear charge
Qno.21 Mass of a nucleus is of the order of .
a) 10-¹⁹
b) 10-²¹
c) 10-²⁴kg
d) 10-³¹ kg
Qno.22 The atomic mass number of a nucleus is the total number of .
a) Nucleons in the nucleus
b) Neutrons in the nucleus
c) Deuterons in the nucleus
d) Protons in the nucleus
Qno.23 Isotopes of an element are the atoms whose nuclei have .
a) The same atomic number Z but differ in mass number A
b) The same mass number Abut different in Atomic Z number of protons
c) The same number of neutrons but different number of protons
d) Different number of neutrons as well as Different
Qno.24 Atoms in an element whose atomic number are the same but have different mass are called.
a) Isobars
b) Isotones
c) Isotopes
d) Isomers
Qno.25 The reciprocal of decay constant of a radioactive element is.
a) Half life
b) Mean life
c) Total life
d) Curie
Qno.26 The chemical behaviour of an atom is determined.
a) Mass number
b) Number of isotopes
c) Atomic number
d) Nucleus
Qno.27 The mass of a positron is equal to the mass of
a) Neutron
b) Proton
c) Duetron
d) Electron
Qno.28 Nuclear force is
a) Attractive and long range force
b) Repulsive and long range force.
c) Attractive and short range force
d) Repulsive and short range force.
Qno.29 Nuclear force exists between.
a) Neutron-neutron
b) Proton-proton
c) Proton-neutron
d) All
Qno.30 W+and Z bosons are carriers of .
a) Electronweak interaction at low energy
b) Electronweak interaction at high energy
c) Nuclear forces
d) Gravitational force