E-PolyLearning

36. Window through which X Rays move in experiment is made up of
a. platinum
b. iron
c. steel
d. aluminum
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Answer: (d).aluminum

37. Quantum numbers are used to describe
a. proton
b. nucleus
c. electron
d. positron
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Answer: (c).electron

38. Element volatilized for continuous spectrum effect the
a. number of lines of spectrum
b. continuity of spectrum
c. thickness
d. color
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Answer: (a).number of lines of spectrum

39. In formula 2n2 principle quantum number cannot have value of
a. one
b. three
c. two
d. zero
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Answer: (d).zero

40. 1 Cycle per second is equal to
a. decibels
b. Hz
c. per second
d. none
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Answer: (b).Hz