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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