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
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37. | Quantum numbers are used to describe |
a. | proton |
b. | nucleus |
c. | electron |
d. | positron |
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Answer: (c).electron
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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
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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
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40. | 1 Cycle per second is equal to |
a. | decibels |
b. | Hz |
c. | per second |
d. | none |
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Answer: (b).Hz
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