| 1. | In a group, atomic radii increase due to successive increase of |
| a. | electronic shells |
| b. | proton shells |
| c. | neutron shells |
| d. | nucleus |
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Answer: (a).electronic shells
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| 2. | Distance at which attractive forces of hydrogen overcome repulsive forces is |
| a. | 75.2pm |
| b. | 75.3pm |
| c. | 75.5pm |
| d. | 75.4pm |
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Answer: (d).75.4pm
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| 3. | Unit of electro negativity is |
| a. | one |
| b. | two |
| c. | none |
| d. | three |
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Answer: (c).none
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| 4. | Ionization energies is influenced by nature of |
| a. | orbital |
| b. | nuclear |
| c. | atom |
| d. | electron |
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Answer: (a).orbital
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| 5. | First ionization energy of carbon is |
| a. | 1084 |
| b. | 1085 |
| c. | 1086 |
| d. | 1087 |
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Answer: (c).1086
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