CHM205
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1. _____________ is the only liquid halogen.
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2. The form of carbon that conducts electricity is _________
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3. Of the group IV element, the one that exhibits anomalous behaviour is ___________
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4. The heavier elements of group IV functions as ___________
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5. ___________are the fibrous silicates, having high tensile strength and heat/fire resistance, used as insulators and steam pipe lagging.
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6. Which of these is not an interstitial carbide?
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7. A derivative of ------------- is used in making photographic plates
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8. The second most abundant element in the earth’s crust after oxygen is __________
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9. Which of these is not a raw material for the cement manufacture?
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10. The ground state electronic configuration of phosphorus is ___________
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11. Which of these is not a carbide?
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12. Arsenic has a _____________ odour
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13. The oxide of nitrogen which is colourless and rather unreactive is _________
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14. The only halogen that can oxidize chlorine is __________
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15. The molecular formula of hydrazine is ________
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16. Lead dioxide is used as ___________
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17. Bacteria which convert nitrogen compounds into free nitrogen are known as ___________ bacteria
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18. Mixed chloroflorocarbons are known as _________
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19. Continuous exchange of nitrogen between the atmosphere and the biosphere is called ___________
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20. All group V elements except ____________ react with sulphur to form sulphides.
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21. The halogen _______ is solid at room temperature
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22. Deficiency of one of these leads to goitre in humans
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23. Zeolites are also called ____________
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24. ____________ has the highest electronegativity value
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25. Teflon is form from a derivative of-------------
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26. Which of the group V elements give only one oxidation state?
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27. The halogen which has only two complete electron shells below the valence shell is _______
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28. Zeolites is used in water as____________
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29. Elements having some metallic and nonmetallic properties are called _______
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30. Which of these is true of interstitial carbide?
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31. The most metallic element in group IV is __________
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32. The group of elements in the periodic table that is associated with semiconductor properties is ___________
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33. Of all halogens, _____________ has the highest ionization energy
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34. A derivative of ____________ is used in making photographic plates
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35. When carbon is linked to elements of lower or approximately the same electronegativity,the binary compounds formed are termed
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36. Ammonia acts as a Lewis base because it possesses a _________
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37. The purest form of silicon dioxide is ___________
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38. One of these is not a form of silica?
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39. Conversion of nitrogen into its compounds is known as _________
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40. Nitriles are oxidized to nitrates by ___________
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41. Which of these is not a component of lead-acid battery?
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42. PVC pipes are manufactured using ____________
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43. The ‘great balls of carbon’ in which carbon atoms are symmetrically arranged in closed shells are known as __________
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44. Solid Carbondioxide is known as____________
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45. ____________is a property by virtue of which elements form long chain compounds by single or multiple bonds between atoms of the same element.
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46. ___________ is obtained when of silicates mainly of sodium and calcium is melted and supercooled
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47. The hybridization of nitrogen in ammonia is ___________
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48. Which of these is not a group V element?
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49. Which of the group V metals can not be obtained from its sulphide ore?
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50. The element known as ‘super halogen’ is _________
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51. Silicates are salts of______
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52. Nitrogen is obtained commercially from ___________
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53. Hydrazine is used as a ________ along with liquid air or oxygen as oxidant.
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