CHM205




Category: CHM205

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CHM205

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1. One of these is not a form of silica?

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2. Bacteria which convert nitrogen compounds into free nitrogen are known as ___________ bacteria

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3. Of all halogens, _____________ has the highest ionization energy

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4. When carbon is linked to elements of lower or approximately the same electronegativity,the binary compounds formed are termed

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5. Which of these is not a component of lead-acid battery?

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6. Solid Carbondioxide is known as____________

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7. Which of these is true of interstitial carbide?

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8. The halogen which has only two complete electron shells below the valence shell is _______

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9. Which of these is not a group V element?

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10. Deficiency of one of these leads to goitre in humans

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11. Which of these is not a carbide?

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12. Hydrazine is used as a ________ along with liquid air or oxygen as oxidant.

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13. Which of the group V elements give only one oxidation state?

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14. The form of carbon that conducts electricity is _________

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15. The element known as ‘super halogen’ is _________

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16. Of the group IV element, the one that exhibits anomalous behaviour is ___________

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17. The ground state electronic configuration of phosphorus is ___________

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18. ____________ has the highest electronegativity value

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19. ___________ is obtained when of silicates mainly of sodium and calcium is melted and supercooled

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20. Lead dioxide is used as ___________

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21. The only halogen that can oxidize chlorine is __________

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22. _____________ is the only liquid halogen.

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23. The purest form of silicon dioxide is ___________

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24. ____________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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25. ___________are the fibrous silicates, having high tensile strength and heat/fire resistance, used as insulators and steam pipe lagging.

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26. The most metallic element in group IV is __________

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27. The molecular formula of hydrazine is ________

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28. Continuous exchange of nitrogen between the atmosphere and the biosphere is called ___________

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29. All group V elements except ____________ react with sulphur to form sulphides.

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30. Arsenic has a _____________ odour

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31. The hybridization of nitrogen in ammonia is ___________

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32. A derivative of ____________ is used in making photographic plates

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33. Conversion of nitrogen into its compounds is known as _________

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34. The heavier elements of group IV functions as ___________

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35. Which of these is not a raw material for the cement manufacture?

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36. Which of the group V metals can not be obtained from its sulphide ore?

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37. The ‘great balls of carbon’ in which carbon atoms are symmetrically arranged in closed shells are known as __________

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38. Silicates are salts of______

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39. Mixed chloroflorocarbons are known as _________

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40. Zeolites is used in water as____________

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41. Zeolites are also called ____________

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42. The oxide of nitrogen which is colourless and rather unreactive is _________

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43. Ammonia acts as a Lewis base because it possesses a _________

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44. Nitrogen is obtained commercially from ___________

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45. Teflon is form from a derivative of-------------

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46. Which of these is not an interstitial carbide?

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47. The halogen _______ is solid at room temperature

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48. PVC pipes are manufactured using ____________

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49. A derivative of ------------- is used in making photographic plates

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50. Elements having some metallic and nonmetallic properties are called _______

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51. The second most abundant element in the earth’s crust after oxygen is __________

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52. Nitriles are oxidized to nitrates by ___________

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53. The group of elements in the periodic table that is associated with semiconductor properties is ___________

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