| 1. | Which of the following elements will form an acidic oxide ? | |
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An element with atomic number 19
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An element with atomic number 12
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An element with atomic number 7
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An element with atomic number 3
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Report Question| 2. | The law of the modern periodic table was proposed by ? | |
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Newlands
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D.I. Mendeleev
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H.G.I Moselly
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Dobereincer
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| 3. | Down a group, the electron affinity __________ ? | |
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increases
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increases and then decreases
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remains same
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decreases
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| 4. | A liquid non-metal is ___________ ? | |
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nitrogen
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bromine
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mercury
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phosphorous
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| 5. | At the time of Mendeleev, the number of elements known was ? | |
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64
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62
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63
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65
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| 6. | Which of the following is correct order of atomic size ? | |
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Br < I < Cl < F
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I < Br < Cl < F
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F < Cl < Br < I
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Cl < F < Br < I
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| 7. | Which of the following elements does not lose an electron easily ? | |
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Al
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Mg
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F
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Na
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| 8. | Which of the following oxide is most basic ? | |
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K2O
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Cs2O
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Na2O
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Li2O
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| 9. | Silicon(14) belongs to class of ? | |
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Metalloids
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Non-metal
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Ionic compound
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Metal
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| 10. | Upto which element, the law of octaves was found to be applicable ? | |
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Potassium
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Cobalt
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Calcium
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Oxygen
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