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Tuesday 29 December 2015

General Science Chemistry-3

31. The element used for radiographic imaging:
(a)Calcium        (b) Strontium       (c) Barium          (d) Beryllium
Answer: (c)

32. An anti-oxidant often added to fat containing foods to prevent rancidity:
(a)Ethyl benzoate                                    (b) Methylated chlorobenzene
(c) Butyrated hydroxi anisole            (d) Propyl alcohol
Answer: (c)

33. Which of the following insoluble in water?
(a)Silver Chloride                         (b) Calcium Chloride
(c) Sodium Nitrate                        (d) Magnisium Sulphate
Answer: (a)

34. An example of mineral acid:
(a)Citric acid                            (b) Formic acid
(c) Tartaric acid                        (d) Hydrochloric acid
Answer: (d)

35. The most abundant type of coal:
(a)Bituminous          (b) Anthrasite         (c) Lignite         (d) None of these
Answer: (a)

36. Pigments obtained from plants can be separated by:
(a)Magnet                                         (b) Crystallisation
(c) Chromatography                      (d) Separating Funnel
Answer: (c)

37. Potassium permanganate is used to purify water.  Which among the following properties of it helps in this action?
(a)Reducing        (b) Oxidising      (c) Sterilizing           (d) Leaching
Answer: (b)

38. What type of reaction is in the digestion offood in human body?
(a)Decomposition                      (b) Hydrogenation
(c) Calcination                              (d) Incubation
Answer: (a)

39. Which of the following is called the ‘Mother of Pearl’?
(a)Ammolite          (b) Nacre           (c) Tusk         (d) Sea shell
Answer: (b)

40. Bleaching powder contains;
(a)Magnisium           (b) Sodium        (c) Calcium         (d) Potassium
Answer: (c)

41. It is easily noticed the smell of the LPG gas because of which among the following?
(a)Butane          (b) Propane        (c) Methane              (d)  Ethanethiol
Answer: (d)


42. Teflon, the tough and fire resistant polymer, containing the halogen:
(a)Chlorine          (b) Flourine              (c) Iodine          (d) Bromine
Answer: (b)

43. Froth and foams are examples of the following:
(a)Gas suspended in liquid                         (b) Liquid suspended in gas
(c) Solid suspended in gas                           (d) None of these
Answer: (a)

44. The discomfort due to indigestion can be cured by taking:
(a)Baking soda            (b) Vinegar           (c) Naphthalene                (d)  Benzene
Answer: (a)

45. Chemical properties mostly resemble those of :

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