Home / Atoms and Electrons – 2 – 5

Atoms and Electrons – 2 – 5

71. According to Bohr’s theory of atom, an electron can move in an orbit of ……..

(a) any radius
(b) certain radius
(c) some range of radii
(d) none of the above

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

72. The energy gap between valence and conduction bands in insulators is about ……..

(a) 15 eV
(b) 1.5 eV
(c) zero
(d) 0.5 eV

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

73. Which of the following is quantized according to Bohr’s theory of atom ?

(a) linear momentum of electron
(b) linear velocity of electron
(c) angular momentum of electron
(d) angular velocity of electron

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

74. The electrons in the third orbit of an atom have …….. energy than the electrons in the second orbit.

(a) more
(b) less
(c) the same
(d) none of the above

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

75. When an electron jumps from higher orbit to a lower orbit, it …….. energy.

(a) absorbs
(b) emits
(c) sometimes emits, sometimes absorbs
(d) none of the above

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

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