Atoms and Electrons – 1 – 10

46. Mobility of electron is highest in :

(a) Silicon
(b) Germanium
(c) Gallium arsenide
(d) Carbon

ANSWER
Answer : (b)

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

47. The nature of atomic bond found in diamond is :

(a) Tetravalent
(b) Covalent
(c) Metallic
(d) Ionic

ANSWER
Answer : (b)

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

48. Facing fraction of simple cube is :

(a) 6.48
(b) 0.52
(c) 0.65
(d) 0.89

ANSWER
Answer : (b)

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

49. According to Coulomb’s first law :

(a) Like charges attract each other
(b) Like charges repel each other
(c) There is no force between the charges
(d) None of these

ANSWER
Answer : (b)

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

50. When an electron moves from lower orbit to a higher orbit :

(a) Emission of energy takes place
(b) Absorption of energy takes place
(c) Size of atom increases
(d) Either absorption or emission of energy takes place

ANSWER
Answer : (b)

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

1 2 3 4 5 6 7 8 9 10 Exercise 2

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