| 1. | Energy of electron -52.53kilo joule per mole is for |
| a. | first orbit of hydrogen |
| b. | second orbit of hydrogen |
| c. | third orbit of hydrogen |
| d. | fifth orbit of hydrogen |
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Answer: (d).fifth orbit of hydrogen
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| 2. | Quantum numbers are |
| a. | arithmetical values |
| b. | numerical values |
| c. | geometric values |
| d. | logical values |
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Answer: (b).numerical values
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| 3. | Rutherford in his atomic model could not explain behavior of |
| a. | electrons |
| b. | protons |
| c. | neutrons |
| d. | neutrino |
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Answer: (a).electrons
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| 4. | Lines which are present in atomic emission spectrum are |
| a. | brown |
| b. | dark |
| c. | bright |
| d. | translucent |
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Answer: (c).bright
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| 5. | The Pauli's Exclusion principle states that two electrons in same orbitals have |
| a. | same spins |
| b. | different spins |
| c. | opposite spins |
| d. | vertical spins |
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Answer: (c).opposite spins
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