E-PolyLearning

56. Value of energy of electron -145.92 in kilo joule per mole is for
a. first orbit of hydrogen
b. second orbit of hydrogen
c. third orbit of hydrogen
d. fourth orbit of hydrogen
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Answer: (c).third orbit of hydrogen

57. X rays produced by each metal are
a. same
b. characteristic
c. not produced
d. distorted
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Answer: (b).characteristic

58. Neutron is splitted into proton, electron and
a. anti neutrino
b. positron
c. neutrino
d. none of these
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Answer: (c).neutrino

59. Particles which were deflected backwards in Rutherford's experiment were hit upon by
a. nucleus
b. empty space
c. electrons
d. protons
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Answer: (a).nucleus

60. Physical and chemical properties of elements are affected by
a. atomic number
b. atomic masses
c. neutrons
d. protons
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Answer: (a).atomic number