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PYQ 1200 Q/A Part - 1
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Kerala PSC General Science Book Study Materials Page 336
Book's First Page(a) Ammonium chloride and zinc chloride (b) Sodium chloride and calcium chloride (c) Magnesium chloride and zinc chloride (d) Ammonium chloride and calcium chloride Ans: (a) 61. The iron container (vessel) is galvanized by: [Jharkhand PCS (Pre) 2008] (a) Chromium (b) Zinc (c) Aluminium (d) Nickel Ans: (b) 62. Silver ware turns black after a period of time due to formation of [NDA 2011] (a) nitrate coating on silver (b) sulphide coating on silver (c) chloride coating on silver (d) oxide coating on silver Ans: (b) 63. Which one among the following methods is not effective in removing arsenic from contaminated ground water? [NDA, 2011] (a) Boiling (b) Coagulation adsorption (c) Ion exchange (d) Reverse osmosis Ans: (b) 64. Cryolite is an ore of which one of the following metal? [CDS 2008] (a) Antimony (b) Barium (c) Arsenic (d) Aluminium Ans: (d) 65. Usually doctors recommend the foodstuffs which are prepared in the oil with comparison to the vegetable ghee because; [Uttrakhand PCS (Pre) 2008] (a) oil has unsaturated fats (b) oil has saturated fats (c) to store the oil is convenient (d) oil is cheeper Ans: (a) 66. Which one of the following pairs of gases mainly cause the explosion in the land mines? [IAS (Pre) 2008] (a) H2 and 02 (b) Oxygen and acetylene (c) Methane and air (d) Carbondioxide and methane Ans: (c) 67. The catalyst used in the hydrogenation process of the oils is : (a) Fe (b) Ni (c) Mo (d) Pt Ans: (b) 68. Which of the following is another name of RDX: [IAS (Pre) 2007] (a) Cynohydrine (b) Deestron (c) Cychlohexane (d) Cychlonite Ans: (d) 69. The catalyst used in the production of H2SO4 by the Contact process is/ are: (a) pieces (powder) of iron (b) pieces (powder) of platinum (c) oxide of nitrogen (d) nickel Ans: (b) 335