| 12. | In Rutherford atomic model alpha particles were stroked on |
| a. | aluminum |
| b. | gold |
| c. | silver |
| d. | titanium |
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Answer: (b).gold
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| 13. | Series which is further divided into smaller lines is |
| a. | Balmer series |
| b. | Pfund series |
| c. | Brackett series |
| d. | Lyman series |
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Answer: (a).Balmer series
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| 14. | Energy of electron is zero |
| a. | near nucleus |
| b. | at infinity |
| c. | in first orbit |
| d. | in last orbit |
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Answer: (b).at infinity
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| 15. | Visible spectrum has |
| a. | six colors |
| b. | five colors |
| c. | seven colors |
| d. | nine colors |
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Answer: (c).seven colors
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